This paper develops a frequentist model averaging approach for threshold model specifications. The resulting estimator is proved to be asymptotically optimal in the sense of achieving the lowest possible squared errors. In particular, when com-bining estimators from threshold autoregressive...

We design three experiments to examine how group incentives moderate the motivational effects of cash versus tangible rewards. Our first experiment shows that, relative to individual incentives, group incentives can magnify any negative effect of the uncertain attractiveness of a less-fungible...