Violence and migration: evidence from Mexico’s drug war

Table 7 Falsification tests

Panel A: first stage results, state panel
Alternative transport network measure	Random federal highways	Airport runways	Airport platforms	State highways
Outcome variable = homicides	(1)	(2)	(3)	(4)
Transport measure 2005*	0.00885	−0.04195	−0.12049	0.00034
Cocaine seizures in Colombia	(0.00850)	(0.05134)	(0.08154)	(0.00118)
Observations	224	224	224	224
Angrist-Pischke F test	1.085	0.668	2.184	0.0845
Anderson-Rubin LM ChiSquared	1.146	0.706	2.295	0.0892
Panel B: first stage results, municipal panel
Alternative transport network measure	Random federal highways
Outcome variable = homicides	(1)
Transport measure 2005*	−0.02361
Cocaine seizures in Colombia	(0.02739)
Observations	14,262
Angrist-Pischke F test	0.743
Anderson-Rubin LM ChiSquared	0.704

Robust standard errors in parentheses
***p < 0.01, **p < 0.05, *p < 0.1
All regressions include state or municipal controls (except state highways, which are removed in column 4) and year fixed effects
Source: Mexican Census, as accessed through IPUMS, ENOE, INEGI, Colombian Ministry of Defense