Table 9 Results of the parallel trend test.

From: Harvesting environmental sustainability—the fertilizer use efficiency gains of China’s high-standard farmland initiative

Variables

Coefficient

Robust standard error

DID × 2009

−1.629***

0.491

DID × 2010

−0.587

0.520

DID × 2011

−0.746

0.499

DID × 2012

−1.054

0.955

_Cons

−1.575***

0.409

Control variables

Yes

Time fixed effects

Yes

Regional fixed effects

Yes

R2

0.713

N

300

  1. *** indicates statistical significance at the 1% level.
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