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Table 2 Difference-in-differences method

From: Impact of free maternal health care policy on maternal health care utilization and perinatal mortality in Ghana: protocol design for historical cohort study

 

Before treatment

After treatment

Difference

Treatment (T)

X0

Y0

T = Y0–X0

Comparison (C)

X1

Y1

C = Y1–X1

Difference

X0–X1

Y0–Y1

DD = (Y0–X0) – (Y1–X1) = T-C

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Reproductive Health

ISSN: 1742-4755