... VALUE OF IMPROVED WASTEWATER TREATMENT INFRASTRUCTURE IN INDIA WORKING PAPER 51/2010 15 attribute with four levels, i.e., (monthly increase in the municipal tax) were entered in cardinal-linear ... investments to sustain or improve the recreational services provided by the park, such as walking and picnicking. No, Yes A monthly increase in the municipal tax Payment vehicle in Indian ... Heterogeneity is often the result of differences of the social, economic, demographic and attitudinal characteristics of the respondents (Boxall and Adamowicz, 2002). In order to gain insight into the...