When Should a Soccer Manager Insert His Subs?

Nifty article in today's Journal about a nifty study by Bret Myers of Villanova: "The pace and flow of soccer generally make it difficult for managers to affect the outcome of a match once it begins. Since soccer has almost no stoppages for coaches to draw on clipboards or strategize with their players, a manager's most critical in-game decision may be choosing when to utilize their three substitutions."

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