The prediction of genetic gain from artificial selection in a trait is important plant and animal breeding. Lush’s classical breeder’s equation (BE) widely used for this purpose, although it also applied to predicting evolution under natural selection. current application high throughput sequencing techniques potentially allows breeders at the individual gene level capture both additive non-add...

We introduce time and risk into the fixed-variable cost tradeoff in heterogeneous firm trade models: Investing exporting gradually stochastically lowers costs of exporting. In model, aggregate dynamics arise from producer-level decisions to invest lowering their future variable export costs, tariff reforms generate time-varying elasticities. The gains reducing tariffs substituting away creation...

We propose a sufficient statistic to measure the ex-post welfare gains from trade in CES models featuring any productivity distribution and pattern of selection into production exporting. This is based on single data moment, change market share continuing domestic producers, structural parameter, elasticity substitution between products. apply our Canada's Canada-US Free Trade Agreement using o...