توضیحات
Computers are now involved in many economic transactions and can capture data associated with these transactions, which can then be manipulated and analyzed. Conventional statistical and econometric techniques such as regression often work well, but there are issues unique to big datasets that may require different tools.First, the sheer size of the data involved may require more powerful data manipulation tools. Second, we may have more potential predictors than appropriate for estimation, so we need to do some kind of variable selection. Third, large datasets may allow for more flfl exible relationships than simple linear models. Machine learning techniques such as decision trees, support vector machines, neural nets, deep learning, and so on may allow for more effective ways to model complex relationships. In this essay, I will describe a few of these tools for manipulating and analyzing
big data. I believe that these methods have a lot to offer and should be more widely known and used by economists. In fact, my standard advice to graduate students these days is go to the computer science department and take a class in machine learning. There have been very fruitful collaborations between computer scientists
and statisticians in the last decade or so, and I expect collaborations between computer scientists and econometricians will also be productive in the future
Tools to Manipulate Big Data
Economists have historically dealt with data that fi ts in a spreadsheet, but that is changing as new more-detailed data becomes available (see Einav and Levin 2013, for several examples and discussion). If you have more than a million or so rows in a spreadsheet, you probably want to store it in a relational database, such as MySQL. Relational databases offer a flfl exible way to store, manipulate, and retrieve data using a Structured Query Language (SQL), which is easy to learn and very useful for dealing with medium-sized datasets
Year : 2014
Publisher : Journal of Economic Perspectives
By : Hal R. Varian
File Information : English Language / 26 Page /Size : 1.4 M
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سال : 2014
ناشر : Journal of Economic Perspectives
کاری از : Hal R. Varian
اطلاعات فایل : زبان انگلیسی / 26 صفحه / حجم : 1.4 M
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