# kaal:claim:2389416-035

**Claim.** The difference-in-differences treatment effect is unstable over time: it loses significance in June and July 2012, then becomes significant again in August and September 2012 with negative coefficients and in October 2012 with a positive coefficient.

**Type.** empirical  **Support.** evidenced

**Holds when.**

- monthly DiD regressions March to October 2012

**Source quote.**

> It loses significance in June and July, but it becomes significant again in August, September (with a negative coefficient) and October (with a positive coefficient).

**From.** Wulf A. Kaal, Barbara Luppi, Sandra Paterlini, *Did the Dodd-Frank Act Impact Hedge Fund Performance* (2014), 5.3. Difference-in-Difference Design

**Cite as.** Wulf A. Kaal, Barbara Luppi, Sandra Paterlini, Did the Dodd-Frank Act Impact Hedge Fund Performance (2014). SSRN: https://ssrn.com/abstract=2389416

**Verify.** sha256 of source PDF `0e1c4615b104821577498d9655de43b9c5c3e985bb0215f56c038b8232be65c3` at https://raw.githubusercontent.com/wulfkaal/Academic-Papers/main/papers/pdf/Kaal%20et%20al.%20-%202014%20-%20Did%20the%20Dodd-Frank%20Act%20Impact%20Hedge%20Fund%20Performance.pdf

**Topics.** institutional-design

**Keywords.** difference-in-differences, instability, treatment-effect, persistence

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