Extract of the dataset constructed by Cattaneo, Frandsen, and Titiunik (2015), which include measures of incumbency advantage in the U.S. Senate for the period 1914-2010.

Numeric vector containing 1390 observations:

- margin
Numeric vector. See Cattaneo, Frandsen and Titiunik (2015) regarding details about this dataset.

Cattaneo, M. D., B. Frandsen, and R. Titiunik. (2015). Randomization Inference in the Regression Discontinuity Design: An Application to the Study of Party Advantages in the U.S. Senate. *Journal of Causal Inference* 3(1): 1-24.

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