Summer has arrived to Finland and a bottle of water is your best friend because without that you would pass out of the hot weather.
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In my field of research we’re often running regressions with innovation expenditures or sales with new products aon the left-hand side. Usually we observe many zeros for these variables because firms do not invest at all in R&D and therefore also do not come up with new products. 544 more words
Going camping? Be Careful What You Drink – OLS-Health