add_prefix

prefix

<p>Adds a prefix to the column names of a matrix / data.frame.</p>


Calculates the Outside Option Index proposed by Caldwell and Danieli
(2018) <https://drive.google.com/file/d/1j-uwD19S4gqgXIXeYch9jGBCaDhWZlRQ/view>.
This index uses the cross- sectional concentration of similar workers
across job types to quantify the availability of outside options as a function of
workers<e2><80><99> characteristics (e.g. commuting costs, preferences, and skills.)

Elad Guttman

add_prefix: Add prefix

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