Easy-to-read blog posts on Cluster SE



Miguel, E., Saiegh, S. M., & Satyanath, S. (2008). National cultures and soccer violence (No. w13968). National Bureau of Economic Research.
  • (1) 内戦→暴力を許容する文化→サッカーの試合での振舞/(2) 暴力を許容する文化→内戦→サッカーの試合での振舞
  • この2つのcausal mechanismsの識別は不可能
  • 文化と制度は相互に依存しているので、識別が難しい。よくmigrantsが使われるが(文化は引き継いでいるが、直面している制度は一緒との想定)、欧州のサッカーリーグに移籍してきたサッカー選手も一種の移民として考えられる
  • 出身国の内戦の歴史(“the number of years a country suffered from civil war between 1980 and 2005” from the PRIO dataset)とイエローカード・レッドカードの枚数の相関
  • 年報、移籍金など選手の質を測る変数はビデオゲームから入手
  • 偏ったサンプルなのでExternal validityに注意


Ken Miura and Takeshi Sakurai (2015) “The Impact of Formal Insurance Provision on Farmer Behavior: Evidence from Rural Zambia” PRIMCED Discussion Paper No.67. Hitotsubashi University.

Abstract: This study presents empirical evidence of changes in farmer behavior after offering them weather index insurance contracts. To quantify the impacts of insurance on agricultural decision-making, this study makes use of the random allocation of free insurance to small-scale farmers in rural Zambia, while endogenous insurance demands are also investigated. Our empirical results show that the provision of insurance leads farmers to sow maize seeds earlier — a practice known to increase maize yield, but which is riskier in terms of rainfall variability. In addition, it is found that insured farmers enlarge the maize field size and use more fertilizer; that is, the provision of insurance encourages farmers to invest in maize production in a risky environment. We also report suggestive but interesting evidence that weather index insurance could substitute for small-livestock holdings, a conventional self-insurance tool used to mitigate income variation.