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Suppose you have data on year of birth, but you want to group several years together, e.g. group 1950, 1951 and 1952 births together; 1953, 1954, and 1955 together, etc. Below is some JavaScript code…

Oftentimes I hear conservatives argue for freer markets on efficiency grounds. Typically this will take the form of a pseudo-counterfactual, along the lines of “Well if there were profits to be made in this market,…