Different astrophysical methods can be combined to detect possible deviations from General Relativity. In this work, we consider a class of $f(R)$ gravity models selected by the existence Noether symmetries. framework, it is determine set static and spherically symmetric black hole solutions, encompassing small departures Schwarzschild geometry. particular, when only dominating interaction, exp...

This paper examines a single, narrow decision—the choice on fourth down in the National Football League between kicking and trying for a first down—as a case study of the standard view that competition in the goods, capital, and labor markets leads firms to make maximizing choices. Play-by-play data and dynamic programming are used to estimate the average payoffs to kicking and trying for a fir...

Absfracr: We study regression designs, with an eye to maximizing the minimum power of the standard test for Lack of Fit. The minimum is taken over a broad class of departures from the assumed multiple linear regression model. We show that the uniform design is maximin. This design attains its optimality by maximizing the minimum bias in the regression estimate of 0’. It is thus surprising that ...

We conduct a battery of experiments in which agents make choices from several pairs of all-loss-lotteries. Using these choices, we estimate a representation of individual preferences over lotteries. We find statistically and economically significant departures from expected utility maximization for many subjects. We also estimate a preference representation based on summary statistics for behav...

Examining the Federal Trade Commission's retrospective challenge of a hospital merger in Illinois, the author provides an insightful analysis of one of the agency's major antitrust enforcement initiatives in health care in the last several years. Because the case produced several departures from antitrust orthodoxy, these departures may affect the trials of future hospital mergers that are chal...

While several plots of the aggregate age distribution suggest that firm age is exponentially distributed, we find some departures from the exponential benchmark. At the lower tail, we find that very young establishments are more numerous than expected, but they face high exit hazards. At the upper tail, the oldest firms are older than the exponential would have predicted. Furthermore, the age d...