Example: marketing
Glob Al Strategy On Diet
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THE POTATO’S CONTRIBUTION TO POPULATION AND …
scholar.harvard.eduOur strategy shares most of the advantages and disadvan-tages of a standard DD strategy. On the one hand, it allows us to control for both country and time-period fixed effects so that all time-invariant differences across countries—such as geogra-phy, food preferences, or institutions (to the extent that they