| Strategy |
Response rate |
Cost per recruited panelist |
|
Brief description |
n
|
Estimate |
Standard error |
p-valuea |
Estimate |
Standard error |
p-valuea |
| 1 |
Standard
|
1,213 |
27.5% |
1.3% |
--- |
$66.95 |
$3.13 |
--- |
| 2 |
USPS standard
|
250 |
18.0% |
2.4% |
0.002 |
$84.44 |
$11.40 |
0.139 |
| 3 |
Cash pre
|
250 |
23.2% |
2.7% |
0.167 |
$65.52 |
$7.54 |
0.860 |
| 4 |
$40 Target promised
|
250 |
16.0% |
2.3% |
0.000 |
$94.47 |
$7.59 |
0.001 |
| 5 |
$60 Target promised
|
250 |
19.2% |
2.5% |
0.007 |
$105.74 |
$5.66 |
0.000 |
| 6 |
Check promised
|
250 |
20.0% |
2.5% |
0.015 |
$83.99 |
$5.30 |
0.006 |
| 7 |
Electronic promised
|
250 |
22.0% |
2.6% |
0.075 |
$78.09 |
$4.54 |
0.043 |
| 8 |
Combination
|
250 |
19.6% |
2.5% |
0.010 |
$78.82 |
$4.71 |
0.036 |
| 9 |
ATP report
|
250 |
26.8% |
2.8% |
0.833 |
$79.78 |
$8.34 |
0.150 |
| 10 |
Email-less
|
250 |
24.0% |
2.7% |
0.262 |
$101.88 |
$11.47 |
0.003 |