The core methods in today's econometric toolkit are linear regression for statistical control, instrumental variables methods for the analysis of natural experiments, and differences-in-differences methods that exploit policy changes. In the modern experimentalist paradigm, these techniques address clear causal questions such as: Do smaller classes increase learning? Should wif...(展开全部)

The core methods in today's econometric toolkit are linear regression for statistical control, instrumental variables methods for the analysis of natural experiments, and differences-in-differences methods that exploit policy changes. In the modern experimentalist paradigm, these techniques address clear causal questions such as: Do smaller classes increase learning? Should wif...(展开全部)

The core methods in today's econometric toolkit are linear regression for statistical control, instrumental variables methods for the analysis of natural experiments, and differences-in-differences methods that exploit policy changes. In the modern experimentalist paradigm, these techniques address clear causal questions such as: Do smaller classes increase learning? Should wif...(展开全部)

The core methods in today's econometric toolkit are linear regression for statistical control, instrumental variables methods for the analysis of natural experiments, and differences-in-differences methods that exploit policy changes. In the modern experimentalist paradigm, these techniques address clear causal questions such as: Do smaller classes increase learning? Should wif...(展开全部)

Douglas Adams is back with the amazing, logic-defying, but-why-stop-now fifth novel in the Hitchhiker Trilogy. Here is the epic story of Random, who sets out on a transgalactic quest to find the planet of her ancestors. Line drawings. From the Hardcover edition.

Thirty years of celebrating the comic genius of Douglas Adams Arthur Dent hadn't had a day as bad as this since the Earth had been blown up. Depressed and alone, Arthur finally settles on the small planet Lamuella and becomes a sandwich maker. Looking forward to a quiet life, his plans are thrown awry by the unexpected arrival of his daughter. There's nothing worse than a frus...(展开全部)

The Hitch Hiker's Guide to the Galaxy has, in what we laughingly call the past, a great deal to say on the subject of parallel universes. Very little of this is, however, at all comprehensible to anyone below the level of Advanced God, and since it is now well-established that all known gods came into existence a good three millionths of a second after the Universe began rather...(展开全部)

Douglas Adams is back with the amazing, logic-defying, but-why-stop-now fifth novel in the Hitchhiker Trilogy. Here is the epic story of Random, who sets out on a transgalactic quest to find the planet of her ancestors. Line drawings. From the Hardcover edition.

The Hitch Hiker's Guide to the Galaxy has, in what we laughingly call the past, a great deal to say on the subject of parallel universes. Very little of this is, however, at all comprehensible to anyone below the level of Advanced God, and since it is now well-established that all known gods came into existence a good three millionths of a second after the Universe began rather...(展开全部)

Econometrics is the quantitative language of economic theory, analysis, and empirical work, and has become a cornerstone of graduate economics programs. Econometrics provides graduate and PhD students with an essential introduction to this foundational subject in economics, and serves as an invaluable reference for researchers and practitioners. This comprehensive textbook teac...(展开全部)