Score contribution per author:
α: calibrated so average coauthorship-adjusted count equals average raw count
Measurement of the value of “media capture” (the control of newspapers by business or political interests) is difficult. However, if capture is valuable, it should affect the price of newspaper shares. Useful information about the value of media capture should be retrievable from Stock Exchange data. Interwar France provides a unique setting to implement this idea because key newspapers floated voting and nonvoting stocks. Combined with takeover prices, data yield estimates of the price of media capture and of the time-series evolution of this price. Comparison with Britain sheds new light on a dark episode of French history.