When the Levee Breaks: Black Migration and Economic Development in the American South

Working Paper: NBER ID: w18296

Authors: Richard Hornbeck; Suresh Naidu

Abstract: In the American South, post-bellum economic stagnation has been partially attributed to white landowners' access to low-wage black labor; indeed, Southern economic convergence from 1940 to 1970 was associated with substantial black out-migration. This paper examines the impact of the Great Mississippi Flood of 1927 on agricultural development. Flooded counties experienced an immediate and persistent out-migration of black population. Over time, landowners in flooded counties dramatically mechanized and modernized agricultural production relative to landowners in nearby similar non-flooded counties. Landowners resisted black out-migration, however, benefiting from the status quo system of labor-intensive agricultural production.

Keywords: Black migration; Economic development; Agricultural mechanization; Mississippi flood

JEL Codes: N32; N52; O10


Causal Claims Network Graph

Edges that are evidenced by causal inference methods are in orange, and the rest are in light blue.


Causal Claims

CauseEffect
1927 Mississippi flood (H84)black outmigration (F22)
black outmigration (F22)agricultural mechanization and modernization (Q16)
1927 Mississippi flood (H84)agricultural mechanization and modernization (Q16)
1927 Mississippi flood (H84)changes in agricultural capital and farm sizes (Q15)

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