Explanatory variables | Entire | Excluding highest category | Excluding | Excluding | ||
---|---|---|---|---|---|---|
sample | Income (I) | Age (II) | (I) and (II) | protest responses | ||
Bid | −0.0024*** | -0.0024*** | −0.0024*** | −0.0023*** | −0.0019*** | |
(2008 US $) | (0.0003) | (0.0003) | (0.0003) | (0.0003) | (0.0003) | |
Environmental and social attitudes | ||||||
Air pollution problem is very important (1 if yes; 0 otherwise) | 1.1512 (0.2560)*** | 1.0818 (0.2495)*** | 1.1728 (0.2575)*** | 1.0987 (0.2510)*** | 0.5677 (0.2787)** | |
Poverty/economic development problem is very important (1 if yes; 0 otherwise) | −1.1317 (0.4669)* | −1.1207 (0.4657)* | −0.9308 (0.4561)* | −0.9203 (0.4538)* | −1.2010 (0.4642)* | |
Both air pollution and poverty problems are very important (1 if yes; 0 otherwise) | 1.3957 (0.5054)** | 1.4635 (0.5044)** | 1.1676 (0.4937)* | 1.2383 (0.4921)* | 1.4261 (0.5088)*** | |
Family concerns | ||||||
Family member sick of respiratory illness or allergy (1 if yes; 0 otherwise) | 0.9372 (0.2477)*** | 0.7538 (0.2462)** | 0.8998 (0.2499)*** | 0.7130 (0.2483)** | 0.9495 (0.2695)*** | |
Car at household (1 if yes; 0 otherwise) | 0.4188 (0.2282) | 0.5274 (0.2291)* | 0.4392 (0.2277) | 0.5504 (0.2285)* | 0.7003 (0.262)*** | |
More adults at household than sample median (i.e. 2) | −1.3614 (0.2236)*** | −1.1820 (0.2260)*** | −1.3782 (0.2240)*** | −1.1939 (0.2261)*** | −1.6214 (0.2381)*** | |
More children at household than sample median (i.e. 1) | -0.331 (0.2359) | -0.3832 (0.2327) | −0.2826 (0.2350) | −0.3358 (0.2315) | −0.3456 (0.2596) | |
Socioeconomic controls | ||||||
Male (1 if yes; 0 otherwise) | −0.1644 (0.1956) | −0.0957 (0.1925) | −0.1403 (0.1962) | −0.0703 (0.1932) | −0.7388 (0.2129)*** | |
Job status | ||||||
Part-time job | -0.1352 (0.2568) | -0.1198 (0.2508) | -0.1096 (0.2561) | -0.0934 (0.2500) | 0.3854 (0.2779) | |
Full-time job | 1.0362 (0.3469)** | 1.0279 (0.3422)** | 1.0359 (0.3387)** | 1.0267 (0.3335)** | 1.6952 (0.3601)*** | |
Range of respondent’s age | ||||||
25–35 | 0.1011 (0.2473) | 0.0565 (0.2427) | 0.0948 (0.2465) | 0.0479 (0.2418) | −0.7256 (0.3741)* | |
35–45 | 0.1669 (0.3424) | 0.1354 (0.3406) | 0.1105 (0.3379) | 0.0796 (0.3361) | −0.6871 (0.4609) | |
45–55 | 0.9327 (0.4093)* | 0.8463 (0.4080)* | 0.8960 (0.4098)* | 0.8067 (0.4088)* | 0.0520 (0.4937) | |
>55 | 3.2530 (0.6821)*** | 3.2256 (0.6799)*** | – | – | 2.7303 (0.7448)*** | |
Monthly household income (2008 US$) | ||||||
US $567–US $967 | 0.8850 (0.2529)*** | 0.7802 (0.2463)** | 0.8993 (0.2514)*** | 0.7925 (0.2449)** | 1.6086 (0.3336)*** | |
US $967–US $2167 | 1.5738 (0.4308)*** | 1.4101 (0.4227)*** | 1.5547 (0.422)*** | 1.3889 (0.4132)*** | 1.5789 (0.4247)*** | |
US $2167–US $5000 | -2.0399 (0.5151)*** | – | −1.9532 (0.5096)*** | – | −1.9479 (0.5360)*** | |
Respondent’s contribution to monthly household income | ||||||
50–75% | 1.1867 (0.3164)*** | 1.2078 (0.3140)*** | 1.1626 (0.3153)*** | 1.1854 (0.3133)*** | 0.8187 (0.3083)** | |
>75% | 2.9332 (0.8069)*** | 2.9175 (0.8030)*** | 2.7959 (0.7570)*** | 2.7815 (0.7530)*** | 2.3957 (0.6467)*** | |
Interactions between household income and respondent’s contribution | ||||||
Income | Contribution | |||||
US $567–US $967 | 50–75% | −1.5199 (0.5830)** | −1.4693 (0.5669)** | −1.1988 (0.6195) | −1.1557 (0.6016) | −2.0715 (0.6044)*** |
Interactions between household income and respondent’s contribution | ||||||
Income | Contribution | |||||
US $567–US $967 | >75% | −1.783 (1.0377) | −1.7074 (1.0304) | –1.7075 (1.0030) | −1.6251 (0.9954) | −1.8820 (0.9415)* |
US $967–US $2167 | 50–75% | −2.7109 (0.5566)*** | −2.6308 (0.5483)*** | −2.7178 (0.5544)*** | −2.6349 (0.5453)*** | −2.2579 (0.5569) |
US $967–US $2167 | >75% | −2.3054 (1.1840) | −2.2085 (1.1680) | −2.1273 (1.1453) | −2.0363 (1.1294) | -1.7597* (1.1023) |
Intercept | 0.9889 (0.3649)** | 0.9174 (0.3568)* | 0.9130 (0.3576)* | 0.8441 (0.3500)* | 1.7013*** (0.4430) | |
n | 1541 | 1490 | 1243 | 1192 | 1499 | |
Pseudo-R2 | 0.3527 | 0.3487 | 0.2989 | 0.2925 | 0.3582 | |
Log-likelihood | −434.7521 | −421.9019 | −428.6136 | −415.6528 | -379.1291 |