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. | 0.69 | 0.31 | <0.01 | <0.01 | 0.93 | 0.06 | 0.01 | n/a |
t-ratio | 9.60 | 4.40 | <0.01 | <0.01 | 39.45 | 2.80 | 0.84 | n/a | ||
2 | ≤ 30 days | Prob. | 0.65 | 0.34 | <0.01 | 0.01 | 0.96 | 0.04 | <0.01 | <0.01 |
t-ratio | 9.77 | 6.10 | 0.89 | 0.30 | 23.32 | 2.34 | <0.01 | <0.01 | ||
3 | ≤ 6 months | Prob. | 0.45 | 0.47 | 0.03 | 0.04 | 0.99 | 0.01 | <0.01 | <0.01 |
t-ratio | 16.61 | 15.96 | 4.77 | 2.69 | 48.00 | 0.76 | <0.01 | <0.01 | ||
4 | ≤ 12 months | Prob. | 0.67 | 0.31 | 0.01 | 0.01 | 0.98 | 0.02 | <0.01 | n/a |
t-ratio | 15.30 | 7.50 | 1.56 | 1.16 | 57.79 | 1.96 | <0.01 | n/a | ||
5 | Total | Prob. | 0.60 | 0.37 | 0.01 | 0.03 | n/a | n/a | n/a | n/a |
t-ratio | 13.46 | 8.92 | 2.58 | 3.64 | n/a | n/a | n/a | n/a |