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. Author manuscript; available in PMC: 2022 Sep 6.
Published in final edited form as: Econometrica. 2020 Mar;88(2):727–797. doi: 10.3982/ECTA13734

Table A.VIII:

Population Diversity and the Number of Conflicts across Ethnic Homelands

Number of conflict events
(1) (2) (3) (4) (5) (6) (7) (8)
Poisson Poisson Poisson Poisson Poisson Poisson Poisson Poisson
Observed population diversity 58.949*** (18.286) 54.959*** (18.020) 63.413*** (16.750) 61.608*** (16.685)
Predicted population diversity 53.230*** (9.061) 43.748*** (6.670) 49.242*** (7.403) 51.593*** (7.799)
Ethnolinguistic fractionalization 0.236 (0.498) −0.784** (0.356)
Ethnolinguistic polarization −0.190 (0.430) −0.895** (0.441)
Regional dummies Yes Yes Yes Yes Yes Yes Yes Yes
Geographical controls No Yes Yes Yes No Yes Yes Yes
Climatic controls No No Yes Yes No No Yes Yes
Development outcomes No No Yes Yes No No Yes Yes
Disease environment controls No No Yes Yes No No Yes Yes

Sample Observed Observed Observed Observed Predicted Predicted Predicted Predicted
Observations 207 207 207 207 901 901 901 901
PseudoR2 0.250 0.327 0.463 0.463 0.215 0.451 0.519 0.520
Effect of 10th-90th %ile move in diversity 61.225*** (22.925) 57.081*** (21.677) 65.859*** (21.558) 63.985*** (21.168) 60.379*** (15.693) 49.623*** (10.515) 55.855*** (11.546) 58.521*** (12.213)

Notes: This table exploits variations across ethnic homelands to establish a significant positive reduced-form impact of contemporary population diversity on the number of conflict events during the 1989–2008 period, conditional on the baseline control variables (i.e., proximate geographical and development-related correlates of conflict). The set of continent and regional dummies includes indicators for Europe, Asia, North America, South America, Oceania, North Africa, and Sub-Saharan Africa. Additional climatic covariates refer to the average diurnal temperature range, average cloud cover, and average temperature range in the homeland. The estimated effect associated with increasing population diversity from the tenth to the ninetieth percentile of its distribution is expressed in terms of the change in the number of conflict events. Heteroskedasticity-robust standard errors are reported in parentheses.

***

denotes statistical significance at the 1 percent level,

**

at the 5 percent level, and

*

at the 10 percent level.