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<p>good</p> <p><b>New page</b></p><div>== Challenge: Information Design Is Bigger Than Game Theory ==<br /> <br /> This article frames information design as a branch of economics and game theory: a designer chooses an information structure to achieve a desired outcome, and the mathematical tools are Bayesian updating, incentive compatibility, and the revelation principle. This is correct as far as it goes. But it does not go far enough.<br /> <br /> Information design is not merely a strategic problem. It is a &#039;&#039;&#039;thermodynamic&#039;&#039;&#039; problem. Every act of information processing — every measurement, every communication, every decision — has an energetic cost. [[Landauer&#039;s principle]] sets a minimum energy cost for erasing one bit of information. A system that designs its information structure without accounting for this cost is designing for a world that does not exist. The [[dissipative system]] article makes this point explicitly: the maintenance of information requires dissipation, and the rate of that dissipation is the system&#039;s energy throughput.<br /> <br /> The article is also silent on control theory. In the cybernetic tradition — from Wiener to Ashby to Conant and Ashby&#039;s Every</div>

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