Table II.

Correlations Between the Willingness-to-pay (from the open-ended question) and Human Capital Method Values of Time

Human Capital Method Time interval valued, hourly value used	Correlation with WTP	p*
National average wage
Prep to routine time, (mean $743, range $298–$2197)	−0.09	0.42
Occupied time, (mean $432, range $244–$1643)	0.06	0.56
Dedicated time, (mean $81, range $23–$258)	−0.19	0.07
Hourly income
Prep to routine time, (mean $1147, range $70–$4441)	0.32	0.003
Occupied time, (mean $702, range $74–$3598)	0.42	<0.001
Dedicated time, (mean $122, range $11–$303)	0.29	0.008

^*Spearman’s

Note: Mean WTP from the open-ended question was $263 (median $200, range $0–$2000, n=99 responses). On the payment-scale WTP question, 14% of subjects selected <$50, 20% chose $50–$99, 33% chose $100–$249, 24% chose $250–$499, 6% chose $500–$999, and 4% chose $1000 or more.