Table 14.

The intervention effect on self-reported savings

	Control	Bridges	Bridges PLUS	Wald test: group X time (8)	Bridges PLUS versus bridges	Control versus bridges	Control versus bridges PLUS
	Mean	Mean	Mean		P-value	P-value	P-value
Self-reported savings amount (nominal Ugandan Shillings $)
Baseline	1999.38	2097.48	2363.73	χ2 = 290.21	0.759	0.960	0.474
12 months	5588.71	20,081.64	22,736.49	p < 0.001	0.145	0.000	0.000
24 months	7251.52	31,523.92	37,323.53		0.040	0.000	0.000
36 months	19,817.86	49,315.29	66,198.08		0.041	0.000	0.000
48 months	46,812.50	67,330.06	89,751.23		0.021	0.000	0.000

Comparisons were conducted using the following model: Outcome = intercept + α₁ Bridges + α₂ BridgesPLUS + ∑ α₃ Time + ∑ α₄ Bridges x Time + ∑ α₅ BridgesPLUS x Time + ε. We administered a Wald test to test the assumption that all group by time interaction dummies are jointly equal to zero (i.e., an omnibus test for interaction). For significant omnibus interactions, we further decomposed the group-by-time point interactions by comparing the between group difference at each time point using the -margins- command with a Sidak p-value adjustment for multiple comparisons