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We have many purposes when we talk about “what to do”, and making deals is only one of our purposes.
Getting what we want is only one of many reasons we try to achieve deals; we also want to signal our features, for example.
Analysis aids are only one of many sorts of aids that can help us to make deals; aids can also to organize negotiations, enforce deals, etc.
Most useful deal aids are relatively specific to a particular context, such as real estate sales, or marriages; when available, more specific tools tend to be more useful.
Deal aids can specialize in what groups that they best assist. A particular aid might be best suited for couples, club, firms, or nations. Wider aids specialize in assisting larger groups.
Economic efficiency is our best wide general analysis tool for finding win-win deals that get people what they want. That isn’t everything, but it is a lot. I’m glad I mastered this tool and am eager to apply it. Efficiency can:
Suggest Deals – Efficiency analysis suggests policies to make “the biggest pie.” A deal also needs folks to agree on a way to divide the pie, such as via cash transfers between the parties. Even so, knowing better ways to make bigger pies should make parties more eager to agree to deals to lock in such gains.
Be Part Of A Deal – Groups can make explicit deals to adopt the results of efficiency analysis. For example, legal systems can adopt a general accident rule that puts responsibility on the least cost accident avoider, and government agencies can be instructed to make policy decisions on a cost-benefit basis. Most can reasonably expect to gain from such policies, even if they do not expect to gain from each particular application.
Efficiency analysis is a rough guide, and does not determine exact implications with certainty for each possible situation.
The policies efficiency recommends depend on particular modeling assumptions and parameter estimates, for example, and those depend on particular analysts and sources used.
Even when negotiators have access to solid analyses, deals can fail for many other reasons; good analysis doesn’t ensure good deals.
Most deals are not between all possible parties, and each deal may well disadvantage those not included in the deal.
People may expect to gain from a deal, but end up not actually benefiting.
As a wide general tool, efficiency is less useful for small deals or for contexts where specialized tools are available.
Efficient deals may well be immoral, or unattractive for other purposes of deal-making, or of “what to do” talking.
Few deals can guarantee to get everyone more of what they want, but by encouraging and enabling more better wider deals, the use of efficiency analysis sure seems to me to tend to get most everyone more of what they want. Isn’t that good enough?
OK, now that I’ve tried this exercise of explicitly listing many possible disclaimers, when is this sort of exercise actually worth the effort?