Table 2.

Variable description and descriptive statistics

Variable	Definition	Mean	Std. dev.	N
Hypothetical choices
Attributes of plans chosen by RPS respondents
Insurance	= 1 if Part D stand-alone coverage	0.85	0.35	1525
No deductible	= 1 if Insurance without deductible	0.68	0.47	1525
Gap coverage	= 1 if Insurance with gap coverage	0.36	0.48	1525
Premium	Refer to table 4
Real choices
Attributes of plans chosen by RPS respondents
Insurance	= 1 if Part D stand-alone coverage	0.79	0.41	470
No deductible	= 1 if Plan offers benefits without the $250 deductible of the standard plan	0.49	0.50	470
Gap coverage (generics)	= 1 if Generic drugs covered in the coverage gap of the standard plan	0.07	0.26	470
Gap coverage (brand-name drugs)	= 1 if In addition to generics, brand-name drugs also covered in the coverage gap	0.03	0.18	470
Health and prescription drug spending
Drug costs	Total drug costs in 2005, constructed from RPS 2005 (see Winter et al., 2006)	2554.30	3118.45	1569