From: Stated Choice design comparison in a developing country: recall and attribute nonattendance
 |  |  | Efficient | Orthogonal | ||||||
---|---|---|---|---|---|---|---|---|---|---|
Recall # | Recall period | Â | No fixed | Med. fixed | Recom fixed | Dist. fixed | No fixed | Med. fixed | Recom fixed | Dist. fixed |
1 | ≤ 14 days | Prob. | 0.86 | 0.14 | <0.01 | <0.01 | 0.96 | 0.04 | <0.01 | n/a |
t-ratio | 16.88 | 2.75 | <0.01 | <0.01 | 36.95 | 1.62 | <0.01 | n/a | ||
2 | ≤ 30 days | Prob. | 0.84 | 0.16 | <0.01 | <0.01 | 0.95 | 0.06 | <0.01 | n/a |
t-ratio | 19.03 | 4.31 | <0.01 | <0.01 | 51.89 | 3.02 | <0.01 | n/a | ||
3 | ≤ 6 months | Prob. | 0.87 | 0.12 | 0.01 | <0.01 | 0.81 | 0.19 | 0.001 | <0.01 |
t-ratio | 24.00 | 3.23 | 2.81 | <0.01 | 13.74 | 3.40 | 0.09 | <0.01 | ||
4 | ≤ 12 months | Prob. | 0.89 | 0.09 | 0.01 | 0.01 | 0.95 | 0.05 | 0.002 | n/a |
t-ratio | 21.93 | 2.27 | 2.85 | 0.86 | 53.27 | 2.98 | 0.62 | n/a | ||
5 | Total | Prob. | 0.88 | 0.10 | 0.01 | 0.01 | 0.17 | 0.82 | <0.01 | 0.02 |
t-ratio | 28.75 | 3.53 | 2.95 | 1.61 | 6.35 | 26.43 | 0 | 0.94 |