Data collection, estimation, and hypothesis testing. Use of econometric models for analysis and policy. (Same as Economics 208D but requires additional term paper; not open to students who have taken Economics 208D.) Economics MA's only. All other students require permission number. Prerequisites: Economics 21 and 22 or 201D; Mathematics 212 (co-requisite); Statistical Science 101, 111, 230, 130 or 250, or Mathematics 230 or 342.