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. 2012 Apr 2;109(16):6000–6005. doi: 10.1073/pnas.1115944109

Table 3.

Predicted probabilities of population mobility under various conditions of crop failure

Exposure to crop failure
Subdistrict level Household level All moves (%) Within-district moves (%) Out-of-district moves (%) Person-years exposed
<5% crop failure No crop failure 4.5 (ref) 1.8 (ref) 1.8 (ref) 23,817
Crop failure 3.2+ 1.3 1.0 290
5–20% crop failure No crop failure 5.3+ 2.6** 1.7 6,027
Crop failure 3.4 1.7 1.0+ 889
>20% crop failure No crop failure 10.0*** 5.0*** 3.2** 864
Crop failure 6.6 3.7* 1.7 343

Results are derived from specification E of the event history model (see text). Asterisks indicate the significance of contrasts with the no-crop-failure condition: +P < 0.10, *P < 0.05, **P < 0.01, ***P < 0.001.