Dear colleagues,

Thank you for the suggestions in response to my query last week. As 
requested by several people, I'm following up with what I found. The 
article that came closest to what I was looking for--estimating E(Y|X) = 
a + bX, where both Y and the single X variable can be treated as 
continuous and X is exogenously manipulated--is the following:

Panagopoulos, Costas. 2013. “Extrinsic Rewards, Intrinsic Motivation and 
Voting.” Journal of Politics 75, 1: 266-280.

Panagopoulos's experiment used monetary compensation for voting as the 
treatment, in several different dollar amounts, and his article includes 
(among other specifications) a linear regression of voting on amount of 
promised compensation. Y is obviously not continuous here, and the model 
includes fixed effects for experimental strata, but it does fit the bill 
in terms of an exogenously manipulated X than can be treated as 
continuous, the main thing I was looking for. Plus, the theory and 
empirical results set themselves up for nice discussion as to whether 
the X-Y relationship really is linear.

Best,
Taylor Boas
-- 
***********
Taylor Boas
Assistant Professor
Department of Political Science
Boston University
[log in to unmask]
http://www.taylorboas.com/

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