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. Author manuscript; available in PMC: 2013 Dec 23.
Published in final edited form as: J Dev Econ. 2012 Nov;99(2):10.1016/j.jdeveco.2012.03.001. doi: 10.1016/j.jdeveco.2012.03.001
Full Sample Follow-up Sample Full Sample
2–6 Months after VCT,
2005 Follow-up Survey
2 Years after VCT,
2006 Follow-up Survey
2 Years after VCT,
2006 Follow-up Survey
Dependent Variable: IV
No Likelihood
IV Ordered Probit
Likelihood (1–3)
IV
No Likelihood
IV Ordered Probit
Likelihood (1–3)
IV
No Likelihood
IV Ordered Probit
Likelihood (1–3)
DKs =
Some
Likelihood
DKs =
Missing
DKs =
Some
Likelihood
DKs =
Missing
Ks =
Some
Likelihood
DKs =
Missing
DKs =
Some
Likelihood
DKs =
Missing
DKs =
Some
Likelihood
DKs =
Missing
DKs =
Some
Likelihood
DKs =
Missing
(1) (2) (3) (4) (5) (6) (7) (8) (9) (10) (11) (12)

Got Results 0.304*** 0.086 0.263*** 0.050 0.014 0.009 0.001 −0.003 −0.091** −0.096** −0.103** −0.107**
[0.054] [0.065] [0.071] [0.068] [0.053] [0.052] [0.056] [0.055] [0.044] [0.044] [0.043] [ 0.042]
Got Results * HIV Positive −0.860** −0.929** −0.770*** −0.884*** 0.130 0.140 −0.147 −0.135 0.141 0.145 0.021 0.023
[0.332] [0.412] [0.102] [0.144] [0.300] [0.300] [0.297] [0.290] [0.227] [0.226] [0.202] [0.196]
HIV Positive 0.359 0.358 0.172 0.091 −0.337 −0.349 −0.162 −0.171 −0.413** −0.421** −0.341** −0.346***
[0.242] [0.284] [0.120] [0.059] [0.230] [0.228] [0.192] [0.189] [0.164] [0.164] [0.148] [0.147]

Observations 1,098 924 1098 924 1,098 1,091 1098 1091 1,813 1,802 1813 1802
R-squared 0.182 0.017 -- -- 0.054 0.054 -- -- 0.039 0.039 -- --
F-test (Got +
Got*HIV Positive = 0)
0.11 0.05 0.15 0.12 0.83 0.83 0.60 0.61 0.83 0.83 0.68 0.68
Mean of Dependent Variable 0.76 0.90 1.26 1.12 0.71 0.72 1.39 1.39 0.72 0.72 1.40 1.40

Notes: Each column represents an IV regression where “Got Results” and “Got Results* HIV Positive” are instrumented with having any incentive, the amount of the incentive, distance from the HIV results center, as well as each of these interacted by HIV Positive. Standard errors are clustered by village. Also includes age and age squared, a simulated average distance to the VCT tent, a gender dummy, log expenditures at baseline, years of education, a dummy for being married, and district fixed effects. Columsn 3,4, 7, 8, 11, and 12 present IV ordered probits where “don't know” responses are coded as either some likelihood or are missing values, as indicated above. Coefficients are marginal effects reported as the probility of believing there is no likelihood of infection. Robust standard errors in brackets.

*

significant at 10%;

**

significant at 5%;

***

significant at 1%