Including the protest responses

Excluding the protest responses

Spike

Logit

Probit

Spike

Logit

Probit

a

−0.07585

−0.17944

−0.12277

0.89983

0.76550

0.46774

(−1.604)

(−2.027)

(−2.274)

(14.247)

(7.105)

(7.127)

b

0.0134

−0.01217

−0.00719

−0.01825

−0.01638

−0.00998

(20.273)

(−9.810)

(−10.098)

(20.094)

(−11.780)

(−12.266)

Mean WTP (?

48.73

−14.74

−17.08

67.99

46.72

46.84

Standard deviation

2.55

-

-

2.90

4.06

4.11

Log-likelihood

1685.568

−1003.122

−1002.91

1172.913

−734.0023

−733.8979

N

356

356

356

240

240

240