Shopify is a very popular site building platform for people interested in building eCommerce stores. It has been around for the past few years and seen significant growth in its user base over this time. You can earn a staggering 200% per sale for every new customer you refer to them, which means that there is up to $2400 per new customer on offer.
However, before you get too excited, you should know that affiliates programs worth venturing into aren’t exactly pebbles on the beach. Although there are many options to choose from, finding a reputable network with a good commission payout can be hard. There are a few factors (not just the commission) that you should keep in mind before signing up as an affiliate for a particular affiliate program.

This is the standard affiliate marketing structure. In this program, the merchant pays the affiliate a percentage of the sale price of the product after the consumer purchases the product as a result of the affiliate’s marketing strategies. In other words, the affiliate must actually get the investor to invest in the product before they are compensated.

iii. You will link each use of Product Advertising Content to, and only to, the relevant page of an Amazon Site (for example, the relevant Product detail page or other page to which particular Product Advertising Content most directly relates), and you will not link any Product Advertising Content to, or in conjunction with any Product Advertising Content direct traffic to, any page of a site other than an Amazon Site (however, parts of your application that are not closely associated with Product Advertising Content may contain links to sites other than an Amazon Site).


A disadvantage of digital advertising is the large amount of competing goods and services that are also using the same digital marketing strategies. For example, when someone searches for a specific product from a specific company online, if a similar company uses targeted advertising online then they can appear on the customer's home page, allowing the customer to look at alternative options for a cheaper price or better quality of the same product or a quicker way of finding what they want online.
Choose a product that is relevant to your audience. Think about the traffic that will be visiting your blog. If you are writing a blog about sewing, it might not make sense to have affiliate links to weight lifting equipment. Chances are your readers wouldn’t be interested in that product. This means they would be less likely to click on the affiliate link, let alone purchase something through it.[32]
Cost per action/sale methods require that referred visitors do more than visit the advertiser's website before the affiliate receives a commission. The advertiser must convert that visitor first. It is in the best interest of the affiliate to send the most closely targeted traffic to the advertiser as possible to increase the chance of a conversion. The risk and loss are shared between the affiliate and the advertiser.
Cost per click was more common in the early days of affiliate marketing but has diminished in use over time due to click fraud issues very similar to the click fraud issues modern search engines are facing today. Contextual advertising programs are not considered in the statistic pertaining to the diminished use of cost per click, as it is uncertain if contextual advertising can be considered affiliate marketing.
You will register for and be assigned a unique URL associated with an Associate ID for your participation in the Local Associates Program. You will not use any alternative URL or Associate IDs in connection with the Local Associates Program or use the assigned URL or Associate ID for any other purpose. For purposes of this Local Associates Policy, your unique URL will be considered a Special Link as defined in the Associates Program Operating Agreement.
The Local Associates Portal, all Promotional Materials, and any other information and content provided to you in connection with the Local Associates Program are included as “Service Offerings” under the Associates Program Operating Agreement. All disclaimers and indemnity obligations under the Associates Program Operating Agreement will apply further to liabilities, claims, damages, losses, costs, and expenses relating to your Recommendations Page and any Local Associates Marks or other data or materials you provide in connection with the Local Associates Program.
As search engines have become more prominent, some affiliate marketers have shifted from sending e-mail spam to creating automatically generated web pages that often contain product data feeds provided by merchants. The goal of such web pages is to manipulate the relevancy or prominence of resources indexed by a search engine, also known as spamdexing. Each page can be targeted to a different niche market through the use of specific keywords, with the result being a skewed form of search engine optimization.
(d) You will not use any Program Content, including any name or likeness embodied in that Program Content, in a manner that implies a person’s or company’s endorsement or sponsorship of, or commercial tie-in or other association with, any product, service, party, or cause (including by placing unrelated third party materials in close proximity to Program Content).
If you actually use the product and get results with it, then sharing a case study or your personal experience can be one of the most effective ways of selling those products to your audience. As you build a more responsive list of email subscribers and buyers and your reputation, merchants may offer you “free” samples of e-books or other products.
Affiliate marketing has become a massive online industry over the past several years, emerging as both an effective way for marketers to sell their products and services and for publishers to monetize their audiences. Despite the popularity of affiliate marketing, many publishers still aren’t aware of exactly what affiliate marketing is or how it works. In some cases, these publishers are gatekeepers to an audience that could be very effectively monetized through affiliate marketing, meaning that they’re passing up an attractive revenue stream.
(a) Promotional Materials. Amazon may from time to time provide you with a standard form template and other marketing assets for use in promotional marketing materials (“Promotional Materials”), subject to the limited license in Section 4(b) of this policy. Amazon reserves the right to review your Promotional Materials at any time for compliance with this Local Associates Policy. Any failure by you to provide the Promotional Materials in accordance with our request will constitute a material breach of this Local Associates Policy.
Developing and monetizing microsites can also garner a serious amount of sales. These sites are advertised within a partner site or on the sponsored listings of a search engine. They are distinct and separate from the organization’s main site. By offering more focused, relevant content to a specific audience, microsites lead to increased conversions due to their simple and straightforward call to action.

The development of digital marketing is inseparable from technology development. One of the key points in the start of was in 1971, where Ray Tomlinson sent the very first email and his technology set the platform to allow people to send and receive files through different machines.[8] However, the more recognisable period as being the start of Digital Marketing is 1990 as this was where the Archie search engine was created as an index for FTP sites. In the 1980s, the storage capacity of computer was already big enough to store huge volumes of customer information. Companies started choosing online techniques, such as database marketing, rather than limited list broker.[9] This kind of databases allowed companies to track customers' information more effectively, thus transforming the relationship between buyer and seller. However, the manual process was not so efficient.
Hello, I just read your post. I am a public school teacher and I am trying to create additional income. I enjoyed your article because it provided some good information. I can’t help but think that you should get someone to help you edit your material for grammar mistakes. Please don’t take offense to this, I just think it would help your writing be more professional and polished.
Online advertising started to take shape – Cost Per Mille (CPM) models and paid placements were important components of the marketing mix, but difficult to measure. An emphasis on quality traffic and conversion helped transition marketers from buying impressions and site visitors, to paying exclusively for traffic that resulted in a sale and affiliate marketing lead the charge.
JVZoo’s strength is that it allows experienced marketers to gain access to product launches and a huge range of online courses while setting up sales funnels and customized landing pages. It’s definitely not for someone who wants to monetize a blog or earn money by having users click through and buy physical products. If you’ve carved out a strong presence online in the marketing space, JVZoo might be a perfect fit.
Despite its older origins, email marketing is still a viable source of affiliate marketing income. Some affiliates have email lists they can use to promote the seller’s products. Others may leverage email newsletters that include hyperlinks to products, earning a commission after the consumer purchases the product. Another method is for the affiliate to cultivate email lists over time. They use their various campaigns to collect emails en masse, then send out emails regarding the products they are promoting.
To protect themselves, catalog marketers should ask for material to back up claims rather than repeat what the manufacturer says about the product. If the manufacturer doesn't come forward with proof or turns over proof that looks questionable, the catalog marketer should see a yellow "caution light" and proceed appropriately, especially when it comes to extravagant performance claims, health or weight loss promises, or earnings guarantees. In writing ad copy, catalogers should stick to claims that can be supported. Most important, catalog marketers should trust their instincts when a product sounds too good to be true.
It’s great to see performance marketers thinking about the affiliate channel in relation to budget because the same budget challenges apply in all channels. As an affiliate, I used to get angry every time I got an email telling me an affiliate commission was reduced. Nobody likes being told they are getting less per sale, but I started asking why. Often the answers were incredibly fair. The reality is, there are plenty of valid reasons an affiliate commission isn’t a static number.
As with many aspects of Web monetization, the exact strategies will vary from site to site. There’s no universally superior affiliate marketing offer or merchant. There are, however, some general guidelines on factors to consider when evaluating potential affiliate marketing offers. We’ll dive into several of these below. We’re using screenshots from ShareASale throughout this article to illustrate the process, but the tasks and terms will be generally similar across the major affiliate marketing networks.
Advertisers love affiliate marketing because it involves minimal risk. If a sufficient margin is built in as compensation for the affiliate, it becomes impossible to lose money. That’s because affiliates are generally only paid when a sale is completed (i.e., a lead is converted). Advertisers (or “merchants”) pay nothing for leads that don’t convert.
Affiliate marketing has now invaded Hollywood? We know it invaded US politics in Washington as some politicians (current and retired) are silent affiliate marketers or in MLM. Maybe we can look forward to hearing in the next few years about more celebrities going from actors and actresses to home-based affiliate marketers. Wouldn’t that be something?

Not all types of memberships are available in all territories or to all customers, and Apple may add or remove membership types and the availability of its services in any territory at any time. Individual and Family Memberships are available in 115 countries while Student Memberships are available in 114 countries. Read here to see a current list of countries for student membership availability.
ClickBank allows you to join for free, and the approval process is virtually automatic, so it’s a great choice for people entering the affiliated game for the first time. ClickBank has a ton of information, including FAQs, walk-throughs, and videos available, so the barrier to entry is quite low. There’s also a (paid) program called ClickBank University with courses and assistance from experienced marketers.

If you have identified merchants for whom you think you could generate substantial revenue through an affiliate marketing relationship, there’s no reason not to attempt to set up a direct relationship. There’s also not much magic to pursuing this type of arrangement; if there isn’t a pre-existing relationship, start by reaching out to your potential partner and telling them a bit about your site.
If you read through you’ll see in depth, how they use the tool – Ahrefs – to achieve their goals for their blog(s). Also, they mention what they don’t like about the product upfront, and even though it’s not a lot, it adds credibility to the review since there’s hardly a perfect product. Embedding a video tutorial also makes it easier for others who may prefer to consume audio-visual content.
There are many affiliate programs which pay you recurring income & this is one segment which helps you earn money on autopilot. You will keep making money as long as your referred users stay with the company. Of course, quality of the products plays a major role as nobody would stick to a product or a brand which is not of high quality. Probably this is why companies who have trust in their product offers recurring commission.

In some cases, the purchaser arrives at a page where the affiliate cookie gets set, then leaves and makes a purchase via the PPC channel sometime before the affiliate cookie expires. Other times, the purchaser may click a PPC link, fail to make a purchase, but later purchase via an affiliate link. In both scenarios, the affiliate marketing channel played a part in the sale, but the role was different.


Shopify is probably the most popular e-commerce solutions provider out there, but because there are so many products and options, newcomers can easily get confused. If you believe your audience has products to sell and could benefit from Shopify’s products and are able to elucidate the benefits of signing up for Shopify, you can definitely earn some big money with their affiliate program.

VigLink works a bit differently than other affiliate programs in that it is specifically designed for bloggers. Instead of affiliates picking and choosing which merchants to work with, VigLink uses dynamic links that automatically change to work with merchants that VigLink has determined are offering the highest conversation rates and/or commissions at any given moment.
Setting commission levels in Affiliate Royale is a breeze. Once you purchase a plan and install the plugin, locate the Affiliate Royale menu on the left-hand side of your WordPress dashboard. Next, navigate to Options > Commission Settings and enter your commission rates. You can add more commission levels by clicking add level. Of course, remember to click Update Options when you’re finished in order to save your changes.
The Electronic Fund Transfer Act establishes the rights, liabilities, and responsibilities of participants in electronic fund transfer systems. The EFTA requires participants to adopt certain practices when they deal with transaction accounting and preauthorized transfers and error resolution, and sets liability limits for losses caused by unauthorized transfers.
In addition, if you choose to display prices for any Product on your Site in any “comparison” format (including through the use of any price-comparison tool or engine) together with prices for the same or similar products offered through any web site or other means other than an Amazon Site, you must display both the lowest “new” price and, if we provide it to you, the lowest “used” price at which the Product is available on the Amazon Site.
The easiest thing to do is to sign up for an affiliate marketing network like Commission Junction. They provide a marketplace where your affiliate program will be advertised to other affiliate marketers. They also provide the tracking software for your affiliates so you don’t have to build your own tracking system. In some ways this is better because it takes care of the trust issues. Affiliates are always suspicious of whether or not they’re getting credited for the sales they generate. By having an intermediary take care of transaction tracking and payments, the fear of being cheated is alleviated. 
The third and final stage requires the firm to set a budget and management systems; these must be measurable touchpoints, such as audience reached across all digital platforms. Furthermore, marketers must ensure the budget and management systems are integrating the paid, owned and earned media of the company.[67] The Action and final stage of planning also requires the company to set in place measurable content creation e.g. oral, visual or written online media.[68]

For example, building up a big base of traffic won’t deliver much of a reward if you’re working with the wrong affiliate offers. Similarly, doing a great job marketing the ideal offers to an extremely small traffic base won’t translate into much revenue. Each of these three points must be implemented and improved together, or else you won’t see results.


SkimLinks is probably best for bloggers who want to write content around the affiliate link rather than add affiliate links to existing products. SkimLinks offers a lot of tools to compare commission rates and offers in order to customize your content to optimize your income. Once nice aspect of SkimLinks is that it offers lots of products for non-US creators, including popular UK brands like John Lewis and Tesco.
In order to receive a payment, you must provide us with your bank information. Please provide your banking information, select a preferred currency and set a minimum payment threshold by signing in to your affiliate account. You are eligible to receive commissions through direct deposit after you have reached our program minimum payment threshold. Payment thresholds vary by country or currency and can be seen in your account settings. Affiliate payments are available 90 days after the date of sale, assuming your payment threshold has been met.
Hi Jamie! Thank you for the great information. I just learned about affiliate marketing last week. The source however, is an older couple who work for World Wide Dreams Builders (WWDB). So, basically Amway. After researching a bit. I have no interest in WWDB and. (It sounds like years of recruiting people with minimal payout) Though, I am highly intrigued by e-commerce and affiliate marketing. Before your post the company I recognized was Amazon. Can you please tell me if that will be the best 1st step. I am currently an unemployed student Veteran. So plan to fully emerge into this business regime and would greatly appreciate your advice on this!!!
It also leaves you room to offer higher commissions in the form of bonuses or contests. (ie: For the month of December, we're offering a $100 bonus to all affiliates who reach $1000 in commissions.) That way you're not stuck offering a high commission all the time – but it's something you can offer as a bonus to really get your affiliate's attention and ramp up sales during certain times of the year.
To summarise, flexibility and an understanding of the motivations for different affiliate types is the key factor in setting an intelligent commission structure for any affiliate programme. A full appreciation of the finer details should ultimately result in greater engagement with affiliates and crucially an increase in branding, sales and revenue.
(f)You will not bid on or purchase keywords, search terms, or other identifiers, including the word “amazon,” Kindle,” or any other trademark of Amazon or its affiliates or variations or misspellings of any of these words (“Proprietary Terms” and you can see a non-exhaustive list of our trademarks in the Non-Exhaustive Trademarks Table) or otherwise participate in keyword auctions on any Search Engine if the resulting paid search advertisement is a Prohibited Paid Search Placement (as defined in the Fee Statement). You may purchase paid search advertisements and submit links to Search Engines to appear in response to a general Internet search query or keyword (i.e., in natural, free, organic, or unpaid search results), so long as you comply with the Agreement and those paid or unpaid search results send users to your site and not directly, or indirectly via a Redirecting Link (as defined in the Fee Statement), to an Amazon Site.
In the 1990s, the term Digital Marketing was first coined,.[10] With the debut of server/client architecture and the popularity of personal computers, the Customer Relationship Management (CRM) applications became a significant part of marketing technology.[citation needed] Fierce competition forced vendors to include more service into their software, for example, marketing, sales and service applications. Marketers were also able to own huge online customer data by eCRM software after the Internet was born. Companies could update the data of customer needs and obtain the priorities of their experience. This led to the first clickable banner ad being going live in 1994, which was the "You Will" campaign by AT&T and over the first four months of it going live, 44% of all people who saw it clicked on the ad.[11]
Previously known as Affiliate Window but now officially referred to as “AWIN” after acquiring Zanox a few years ago, this network claims to work with over 13,000 active advertisers and 100,000 publishers (affiliates). Founded in Germany, AWIN’s merchants primarily hail from Europe (especially Great Britain) although the U.S. network is growing rapidly. AWIN is currently active in 11 countries.
Does affiliate marketing still work, as Google doesn’t allow affiliate links or the promotion of affiliate links. So I can’t create an ad directing to an affiliate link, and I can’t create a landing page (and promoting the landing page), with a single purpose of sending users to the affiliate link. Except RTB platforms and Blog based SEO that takes years to build, how can I do affiliate marketing ?
3) Competitor Affiliate Rates – In the business of selling physical items, affiliate commission rates average from 3-15% but I've seen as low as 1% and as high as 50% depending on the industry and product markup. For digital products, it's not uncommon to offer 25-75% commissions, but I've seen as high as 90% (or even 100%) and as low as 3%. As you can see, there's no universal standard affiliate commission. But there will be trends within particular industries.
When you decide to promote, or point traffic to, eBay.com, you’ll use an affiliate link. An affiliate link includes a unique ID given to you by the merchant – at EPN, we call this a Campaign ID. Then, when someone clicks on your affiliate link, the affiliate ID gets stored on that person’s browser within a text file known as a cookie. The EPN cookie contains several pieces of information, called “parameters”, including Campaign ID, to help us track the eBay shopping activity of users after they click on your link to ensure you get paid a commission.affiliate-tracking
With the introduction of the internet, advertisers realised that they could increase their revenue by rewarding websites who refer customers to your site that go on to buy something from you. In essence, this is affiliate marketing or performance-based marketing. An advertiser rewards a website a set amount of commission for each customer that the site refers who goes on to make a purchase.
A relative newcomer that was only founded in 2014, ConvertKit has taken the world of email marketing by storm. According to the company, they now have nearly 20,000 active customers of their email services. Their affiliate program works by paying existing customers a lifetime 30 percent commission for referrals that subsequently become ConvertKit customers or who sign up for ConvertKit webinars and other digital products.
Amazon Associates is an affiliate marketing program run by Amazon which allows you to sell its products on your own website in exchange for a cut of the profits. This enables you to boost your product range, test new types of products on your audience or even build a full business around this and perhaps other affiliate programs. For small businesses that currently sell products online, this could represent a great source of added revenue, if you sell additional products through Amazon, without worrying about getting the products yourself. Amazon conducts the sales and ships them directly to the client.
(i) You will include a date/time stamp adjacent to your display of pricing or availability information on your application if you obtain Product Advertising Content from Data Feeds, or if you call PA API or refresh the Product Advertising Content displayed on your application less frequently than hourly. However, during the same day on which you requested and refreshed the pricing and availability information displayed on your application, you may omit the date portion of the stamp. Examples of acceptable messaging include:
However, before you get too excited, you should know that affiliates programs worth venturing into aren’t exactly pebbles on the beach. Although there are many options to choose from, finding a reputable network with a good commission payout can be hard. There are a few factors (not just the commission) that you should keep in mind before signing up as an affiliate for a particular affiliate program.
VigLink works a bit differently than other affiliate programs in that it is specifically designed for bloggers. Instead of affiliates picking and choosing which merchants to work with, VigLink uses dynamic links that automatically change to work with merchants that VigLink has determined are offering the highest conversation rates and/or commissions at any given moment.

Leadpages also offers an option for affiliates to send referrals to attend a Leadpages webinar with standard commissions paid for any sale generated from the webinar. However, Leadpages requires you to get at least 150 people to sign up (but not necessarily attend) each webinar. Leadpages also offers affiliates the ability to view blog posts and videos on Leadpages’s site, again with the standard commission paid for any sales.


Option 1: Payment by Direct Deposit. We will directly deposit the fees you earn into the bank account you designate once you have provided us with the name of your bank, the account number, the name of the primary account holder as it appears on the account, and other requested identifying information (such as the ABA, IBAN or BIC number, if applicable). If you have chosen payment by direct deposit and you do not provide this information, or it is not valid (for example, the account has been closed or changed), or the payment is otherwise rejected by your bank, you may instead receive payment by check which will be subject to the processing fees described below until you provide valid account information. If you select this option, we reserve the right to hold fees until the total amount due to you reaches the minimum stated in the Payment Minimum Chart.
The fit must be right between you and the merchant who is going to benefit from your promotional efforts, or it simply won’t work. The easiest way to begin with affiliate marketing is to select an affiliate network. Many affiliate networks exist, some which are tied to well-known companies like Amazon, Google, and Apple, while others specialize in specific types of products and services.
Leadpages claims that its affiliate program is not exclusively for affiliate marketers, which is true, but the narrow focus of this niche means that only professionals affiliate marketers will ever be able to earn significant income from the program. Leadpages’s affiliate program does offer quite a lot of different options (webinars, videos, blog posts, free marketing courses, etc.) to send referrals to, which can lead to higher conversion rates if done correctly.

Sellers are responsible for claims they make about their products and services. Third parties - such as advertising agencies or website designers and catalog marketers - also may be liable for making or disseminating deceptive representations if they participate in the preparation or distribution of the advertising, or know about the deceptive claims.

Once you acquire a new customer through one of your affiliate partners, they've entered your ecosystem and you can direct market to that customer without going through your affiliates. Remember to consider that long term value of your customers into the equation when deciding your commission structure. For many businesses, I wouldn't care if I broke-even on affiliate sales – so long as I had a way to maximize the long term value of each new customer they brought me. As you probably know from experience, breaking even on acquiring customers to your sales funnel is nothing to sneeze at in e-commerce. There are many circumstances where I'd literally do that unlimited times if given the option!
The seller, whether a solo entrepreneur or large enterprise, is a vendor, merchant, product creator, or retailer with a product to market. The product can be a physical object, like household goods, or a service, like makeup tutorials. Also known as the brand, the seller does not need to be actively involved in the marketing, but they may also be the advertiser and profit from the revenue sharing associated with affiliate marketing.

You will earn the Special Program Fee Rates described in this Section 4(b) in connection with “Trade-In Events” which occur when (1) a customer clicks through a Special Link on your Site to an Amazon Site and (2) during the resulting Session the customer adds a product to his or her trade-in shopping cart and then submits a trade-in request that Amazon accepts.
The Local Associates Portal, all Promotional Materials, and any other information and content provided to you in connection with the Local Associates Program are included as “Service Offerings” under the Associates Program Operating Agreement. All disclaimers and indemnity obligations under the Associates Program Operating Agreement will apply further to liabilities, claims, damages, losses, costs, and expenses relating to your Recommendations Page and any Local Associates Marks or other data or materials you provide in connection with the Local Associates Program.

An omni-channel approach not only benefits consumers but also benefits business bottom line: Research suggests that customers spend more than double when purchasing through an omni-channel retailer as opposed to a single-channel retailer, and are often more loyal. This could be due to the ease of purchase and the wider availability of products.[24]
But establishing direct affiliate marketing relationships is extremely challenging for a number of reasons, which we’ll get into below. While there are certain instances when a direct relationship makes sense, most affiliates will be better off accepting that networks are part of the equation and focusing on finding the right merchants and maximizing referrals.

You will not be eligible to receive any Standard Program Fees or Special Program Fees for any month if we determine that your Site is primarily promoting free Kindle eBooks and during that month (i) 20,000 or more free Kindle eBooks are ordered and downloaded during Sessions attributed to your Special Links, and (ii) at least 80% of all Kindle eBooks ordered and downloaded during Sessions attributed to your Special Links are free Kindle eBooks.

*Yes: As you may have guessed, the link above is my two-tier affiliate link. There are a few of these links on this site to pay me a small commission and allow me to keep this site free instead of a monthly membership site. Using my two-tier affiliate link will not affect the amount of commission paid to you with this or any other program. My commissions are paid out of the vendor’s cut, not yours.

I’d stick with Amazon if I were you. All of my Amazon sites only have Amazon affiliate links. If you use Google Adsense display ads on your site, you’re literally taking people away from your site for the sake of just a few cents with these type of ads. If you direct them just to Amazon, then you have a greater chance of earning more money from that click.

At its core, affiliate marketing is an online referral program where merchants pay commissions to publishers on sales generated by customers they’ve referred. The merchant can be an online retailer like eBay, or a service provider. Individuals and companies referring the traffic are called publishers, or affiliates, who publish content on the web promoting the merchant’s offerings. Customers are the people that click on the promoted content and make a purchase or complete a specified action. Payment is typically in the form of commission, but sometimes merchants offer a flat rate for a specific action, or a bonus for a type of visitor. EPN offers both commissions and bonuses.


Split testing will ensure that you’ll discover which content resonates well with your audience for promoting the affiliate offer.  Sometimes you may discover that the content (email in this case) without social proof in form of a case study performs better than one with the case study because your audience trusts you not to try to make a quick buck from them by recommending a poor product.
In February 2000, Amazon announced that it had been granted a patent[18] on components of an affiliate program. The patent application was submitted in June 1997, which predates most affiliate programs, but not PC Flowers & Gifts.com (October 1994), AutoWeb.com (October 1995), Kbkids.com/BrainPlay.com (January 1996), EPage (April 1996), and several others.[13]
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