. 2020 Sep 28;17(19):7100. doi: 10.3390/ijerph17197100

Table 4.

Marginal willingness to pay (MWTP) estimation results.

Attributes and Level		MWTP ¹ [90% Confidence Interval] ²
Rest area	LV.1 → LV.2	7682 [5572–11,629]
Rest area	LV.1 → LV.3	6793 [4877–10,368]
Restrooms and facilities designed for young children	LV.1 → LV.2	5615 [3994–8659]
Restrooms and facilities designed for young children	LV.1 → LV.3	6708 [4880–10,190]
Children’s vehicles	LV.1 → LV.2	6348 [4586–9613]
Children’s vehicles	LV.1 → LV.3	6468 [4650–9820]
Specialized courses for young children and families	LV.1 → LV.2	6986 [5024–10,674]
Specialized courses for young children and families	LV.1 → LV.3	9112 [6704–13,672]

¹. Willingness to pay is a payment amount that one is willing to pay as content is added compared to level 1 (current status). ². The 90% confidence interval was calculated using the Krinsky–Robb parametric bootstrap method, with 10,000 resamples [62].