というアンドレイ・シュライファーらのNBER論文(ungated版WP)をConversable Economistが紹介している(原題は「Letter Grading Government Efficiency」で、著者はAlberto Chong, Rafael La Porta, Florencio Lopez-de-Silanes, Andrei Shleifer)。 以下はその要旨。 We mailed letters to non-existent business addresses in 159 countries (10 per country), and measured whether they come back to the return address in the US and how long it takes. About 60% of the lette