Solutions to Moral Hazard

Course Outline

Solutions to Moral Hazard

What are some solutions to moral hazard? We could try to make information less asymmetric — meaning both parties have similar information, making it harder for one party to exploit the other. We could also try to reduce the incentive of the agent to exploit their information advantage. Online ratings and reviews on Yelp, Angie’s List, or Amazon, for instance, incorporate both of these solutions. The reviews give you more information about a product or service and close the information gap between buyers and sellers. In addition, sellers’ incentives change, as they now have to think about their reputation. They likely won’t want to exploit you if they know it will result in a negative online review.

What are some other approaches to modifying the incentives of those with an information advantage? One approach is to split the diagnosis of a problem from the actual work that needs to be done — for instance, home inspectors don’t fix the problems they identify during their inspection. Another approach is to alter the payment structure to change incentives. For instance, a lawyer is less likely to run up their hours when payment is contingent on winning your case as opposed to the number of hours they work on the case. Ethics also plays a role. Doctors swear to the Hippocratic Oath, which provides them an incentive to not exploit their information advantage. As you can see, there are many solutions to addressing moral hazard.

Teacher Resources


In the previous video, we discussed how asymmetric information can lead to moral hazard, which can lead to people being ripped off, which in turn can lead to markets breaking down.


Now, there are two types of potential solutions to moral hazard problems. First, since the problem is asymmetric information, you can try to make information less asymmetric. If both parties have similar information, then one party cannot so easily exploit the other. Second, if you can't get rid of the information asymmetry, you can try to reduce the incentive of the agent to exploit his or her informational advantage. One example that you're already familiar with works along both of these dimensions: user ratings. You can get ratings for businesses at sites such as Yelp and Angie's List, and for products at places such as Reviews give you more information about a product or service, and they help balance the information between buyer and seller, thereby mitigating issues of moral hazard.


Additionally, the existence of these review sites changes the incentives for the sellers. In our previous example of the auto mechanic we sketched out how your incentive to get your car repaired might conflict with the mechanic's incentive to milk you for extra money. However, the mechanic also has to think about her reputation, which is what leads to future business. Previously, you might have told, well, just a few friends that you got ripped off. Now, today, you can write an online review and reach a much larger audience, maybe thousands of people. A mechanic's online reputation is important to her success and provides an incentive for her not to try to exploit her informational advantage.


While review sites are great, the market is continually evolving, and some sellers try to fight back by faking or manipulating reviews or ratings. There's some obvious examples, like favorably reviewing your friend's book on Amazon if your friend reviews yours. But there are more subtle examples as well. For instance, some universities invite lots of applicants, knowing they will reject them, just hoping to boost their rating for exclusivity. Reviews are more trustworthy if they come from third parties who do not have incentives to bias the review one way or the other. The magazine Consumer Reports, for example, has a reputation for honest reporting because it's a non-profit and it accepts no advertisements and no funding from commercial sources. But there's another problem -- it's hard to exclude people from produced information. Information is also what we call nonrival -- nonexcludable and nonrival.


Do those property sound familiar? Yes, information has the characteristics of a public good. Click to go back and review if you need. It's hard for Consumer Reports to keep the information it provides to only those people who buy the magazine. If you hear that Consumer Reports says that brand X of television is the very best, well you might use that information even if you didn't buy the magazine and pay for it. In this case, we would say that you are free riding, using the benefits of their research and testing without contributing to paying the costs. Free riding is a problem, however, not because it's unfair or unjust, but because it means that information provision may be under-provided in the first place. As a result, there are fewer trustworthy third parties reviewing products and services. So, review sites help solve moral hazard issues by both balancing the information between buyer and seller, and reducing the incentives for the more informed party to exploit an informational advantage.


There are other approaches that work solely by modifying the incentives of those people with the informational advantages. Let's take two examples that might seem completely different, but are actually, conceptually, pretty similar: house inspections, and second opinions from doctors. When you buy a house, you typically get a home inspector to check out the house and identify potential problems. By law in many states, these home inspectors cannot also sell services to fix any problems they've identified. This changes their incentives. No longer do they have the incentive to overstate potential problem issues to inflate the bill.


Similarly, when you go to a doctor for a second opinion, that doctor is simply diagnosing the problem, but not doing the actual treatment. Just like with the home inspector, this eliminates the incentive to run up the bill. Both of these examples split the diagnosis of the issue from the actual work to address the problem. So while the information is still asymmetric, there is less of an incentive to exploit that asymmetry. By the time you're ready to fix the issue, this separate diagnosis by an expert allows you to have much more information. Maybe now, almost as much as the service provider in some ways.


This video has covered the various solutions to moral hazard issues in situations of asymmetric information. In the next video, we'll take up a different kind of response to the asymmetric information problem, namely signaling. See you then.



Verified Available Languages
  • English
  • Spanish
  • Chinese
  • Hindi
  • French
  • Arabic

Thanks to our awesome community of subtitle contributors, individual videos in this course might have additional languages. More info below on how to see which languages are available (and how to contribute more!).

How to turn on captions and select a language:

  1. Click the settings icon (⚙) at the bottom of the video screen.
  2. Click Subtitles/CC.
  3. Select a language.


Contribute Translations!

Join the team and help us provide world-class economics education to everyone, everywhere for free! You can also reach out to us at [email protected] for more info.

Submit subtitles




We aim to make our content accessible to users around the world with varying needs and circumstances.

Currently we provide:

Are we missing something? Please let us know at [email protected]


Creative Commons

Creative Commons License

This work is licensed under a Creative Commons Attribution-NoDerivatives 4.0 International License.
The third party material as seen in this video is subject to third party copyright and is used here pursuant
to the fair use doctrine as stipulated in Section 107 of the Copyright Act. We grant no rights and make no
warranties with regard to the third party material depicted in the video and your use of this video may
require additional clearances and licenses. We advise consulting with clearance counsel before relying
on the fair use doctrine.