In the estimation of simultaneous equation econometric models, overidentifying restrictions improve estimates of the remaining parameters. Natural test statistics for the hypothesis that an equation is overidentified have been developed by Anderson and Rubin and by Basmann. If the residuals are...

One of the important peculiarities of information is that it is expensive to produce but cheap to reproduce. How does a price system react to this phenomenon? One reaction will be to avoid the production of information altogether. Alternatively, firms may decide to keep their information to...