Table 3.
Estimated mixed rank-ordered logit (MROL) model#
| Variables^ | MROL choice coeff.§ |
MROL SD¶ |
MROL Program A coeff.‡ |
MROL Opt-out coeff.‡ |
|---|---|---|---|---|
| Alternative-specific variables | ||||
| Yearly offer (R100s) | 0.147*** (0.0119) |
|||
| CEI format is cash (=1) | 0.185** (0.0916) |
0.674*** (0.130) |
||
| CEI format is food voucher (=1) | 0.104 (0.0849) |
0.700*** (0.196) |
||
| CEI recipients are YPLWH only (=1) | −0.00621 (0.0797) |
0.615*** (0.108) |
||
| Program participants are adherent & non-adherent (=1) | 0.401*** (0.0919) |
0.722*** (0.107) |
||
| CEI is delivered at the clinic (=1) | 0.134* (0.0698) |
0.605*** (0.154) |
||
| Case-specific (individual) variables | ||||
| Age (in years) | −0.0248 (0.0473) |
0.556*** (0.208) |
||
| Female (=1) | 0.108 (0.125) |
0.00363 (0.468) |
||
| Years of formal education | 0.0350 (0.0460) |
−0.121 (0.182) |
||
| Index of assets owned in HH | 0.0493 (0.0408) |
0.0646 (0.194) |
||
| Any food insecurity (=1) | −0.0515 (0.142) |
0.687 (0.630) |
||
| Travel time to clinic | −0.0560 (0.0874) |
−0.661** (0.288) |
||
| Ease of taking ART | 0.0291 (0.0561) |
0.552** (0.222) |
||
| Other explanatory variables | ||||
| Quarterly (=1) | −0.200* (0.112) |
−0.170 (0.196) |
||
| Random block | −0.0614 (0.0400) |
0.0632 (0.160) |
||
| Order of presentation is first (=1) | 0.00469 (0.107) |
0.0558 (0.194) |
||
| Constant | 0.345 (0.617) |
−11.58*** (2.409) |
Notes: Robust standard errors in (parentheses)
p<0.01,
p<0.05,
p<0.1
Means of random coefficients for alternative-specific variables.
Standard deviation (SD) of the random coefficients for alternative-specific variables.
Using Program B as reference. A positive (negative) sign for an attribute means that level impacted positively (negatively) on utility and thus increased (reduced) the probability of choosing an alternative with that level.
Number of participants=168; number of observations=13,440; log-likelihood: −2093.
In the estimation, yearly offer (R100s), age, years of formal education, asset index, travel time, difficulty taking ART, and random block were modelled as continuous; other attributes are dummy coded (=1).
CEI=conditional economic incentive; R100s=South African Rand in 100s; YPLWH=young person living with HIV.