For example, as the corporate law Professor John C. Coffee has put it, put it, public enforcement of directors' duties remains necessary despite the work carried out by Rafael La Porta, Florencio Lopez de Silanes, Andrei Shleifer and Robert W. Vishny, because it is more effective.
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The first attempt to assign numerical values to rules in different legal systems, to evaluate their perceived strength or weakness, was made by a group of finance economists called Rafael La Porta, Florencio Lopez de Silanes, Andrei Shleifer, and Robert W. Vishny.