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. 2007 Oct 17;104(43):16769–16774. doi: 10.1073/pnas.0611107104

Table 1.

Explanatory variables used in spatial regression analysis

Variables Expected relationship to poverty
Exogenous variables
    Rainfall Negative (low rainfall, higher poverty)
    Rainfall variation Positive (high variation, higher poverty)
    Elevation Positive (high elevation, higher poverty)
    Slope Positive (steeper slope, higher poverty)
    Type of land cover Not known
    Distance to towns/municipalities/cities Positive (greater distance, higher poverty)
    Length of growing period (LGP) Negative (longer LGP, lower poverty)
    Soil type Negative (good soil, lower poverty)
Possible endogenous variables
    Population Not known
    No. and density of markets Either direction
    Transport time to towns, markets, and cities Either direction
    Density of roads Either direction