Table 2.
Overview of Surveys(in chronological order)
| Survey | Field Dates | Sampling Strategy | Total Sample | NODS Sample |
|---|---|---|---|---|
| GIBS RDD | Sept–Dec 1998 | Random-digit dial | 2,417 | 907 |
| GIBS Patron | Nov 1998–Jan 99 | Random intercept | 530 | 520 |
| Oregon | Oct–Dec 2000 | Introductory screen: all < 35; subsample 35+ | 1,500 | 1,193 |
| North Dakota | Aug–Oct 2000 | Two-phase probability Screened all; 1/4 full interview |
5,002 | 1,609 |
| Nevada | Oct 2000–Mar 01 | Two-phase probability Screened all; 1/4 full interview |
2,217 | 708 |
| Florida | Oct–Dec 2001 | Random-digit-dial | 1,504 | 1,314 |
| Florida Seniors | Oct–Nov 2002 | Quotas: gender, age, ethnicity | 1,260 | 1,024 |
| Arizona | Oct 2002–Jan 03 | Only if gambled 5+ times. Quotas: gender, ethnicity | 2,750 | 1,592 |
|
| ||||
| TOTAL | 17,180 | 8,867 | ||