天候、操作変数？

"与党は公共投資の配分に影響を与えるのか : 自然実験を用いた実証分析"

https://ir.library.osaka-u.ac.jp/repo/ouka/all/23025/osipp_029_099.pdf

Tamada, K.(2009) “The Effect of Election Outcomes on the Allocation of Government Spending in Japan,” The Japanese
Economy, 36(1), pp. 3-26.

Horiuchi, Y., and J. Saito (2009) “Rain, Election, and Money: the Impact of Voter Turnout on Distributive Policy
Outcomes,” http://pantheon.yale.edu/~js454/rain.pdf.
Horiuchi, Y., and J. Saito (2003) “Reapportionment and Redistribution: Consequences of Electoral Reform in Japan,”
American Journal of Political Science, 47(4), pp. 669–682.