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Table 4 Household-level Heckman probit estimates of ever-adopting and disadoption C88

From: The curious case of C-88: impacts of a potato variety on farmers in Yunnan, China

  Ever grown C88 Disadopted C88
Coef AME Coef AME
# of working age farmers 0.0656
(0.097)
0.0094
(0.014)
 − 0.3530***
(0.129)
 − 0.0559**
(0.026)
Avg. age of working age farmers 0.0195***
(0.006)
0.0028***
(0.001)
 − 0.0121
(0.008)
 − 0.0029*
(0.002)
Avg. yrs of education of working age farmers 0.0872**
(0.034)
0.0125**
(0.005)
0.0002
(0.030)
 − 0.0048
(0.005)
Dummy: 1 if a household is a member of farmer organizations 0.2765
(0.437)
0.0407
(0.066)
 − 0.5513
(0.434)
 − 0.1112
(0.094)
Dummy: 1 if a household is visited by extension agents in prior year 0.5122**
(0.230)
0.0794**
(0.038)
 − 0.2241
(0.275)
 − 0.0688
(0.045)
Share of household farmland allocated to potato 0.5358
(0.407)
0.0770
(0.056)
 − 0.0613
(0.489)
 − 0.0387
(0.066)
Farm size (mu) 0.0921***
(0.023)
0.0132***
(0.003)
 − 0.0022
(0.002)
 − 0.0054***
(0.002)
# of potato plots  − 0.2645***
(0.070)
 − 0.0380***
(0.012)
  
Share of self-kept seed in total potato seed 0.0068
(0.236)
0.0010
(0.034)
 − 0.5058**
(0.225)
 − 0.0753*
(0.041)
Dummy: 1 if a household receives information from cooperatives/extension agents 0.4440**
(0.191)
0.0682**
(0.032)
0.2964*
(0.170)
0.0187
(0.020)
Importance of potato price in choosing potato varieties
1 if important 0.9246***
(0.170)
0.1438***
(0.034)
0.4732
(0.291)
0.0102
(0.046)
1 if very important 1.0843***
(0.305)
0.1703***
(0.057)
0.5028
(0.341)
0.0057
(0.056)
Importance of market demand in choosing potato varieties
1 if important  − 0.0951
(0.212)
 − 0.0132
(0.029)
 − 0.3370
(0.356)
 − 0.0483
(0.055)
1 if very important  − 0.2902
(0.317)
 − 0.0400
(0.042)
 − 1.1534***
(0.403)
 − 0.1804**
(0.085)
HH wealth quintile dummies
1 if quintile 2  − 0.1452
(0.232)
 − 0.0210
(0.033)
  
1 if quintile 3  − 0.4745*
(0.287)
 − 0.0682
(0.042)
  
1 if quintile 4 0.3448
(0.243)
0.0506
(0.037)
  
1 if quintile 5  − 0.4964*
(0.263)
 − 0.0713*
(0.040)
  
# of households in village 0.0012
(0.001)
0.0002
(0.000)
 − 0.0017
(0.003)
 − 0.0003
(0.000)
Village average farm size per HH (mu) 0.0751
(0.054)
0.0108
(0.008)
 − 0.0315
(0.024)
 − 0.0088*
(0.005)
Village total potato area (mu)  − 0.0001
(0.000)
0.0000
(0.000)
 − 0.0004
(0.000)
0.0000
(0.000)
Dummy: 1 if a village experienced serious disease problem during the past five years  − 1.1259***
(0.417)
 − 0.1730**
(0.071)
 − 1.0595*
(0.546)
 − 0.0866
(0.069)
Dummy: 1 if a village experienced serious pest problem during past five years  − 1.1126**
(0.499)
 − 0.1732**
(0.073)
3.0170***
(1.073)
0.3310***
(0.043)
Distance to city town (km)  − 0.0105***
(0.003)
 − 0.0015***
(0.000)
 − 0.0093
(0.006)
 − 0.0008
(0.001)
Distance to county town (km) 0.0155***
(0.006)
0.0022***
(0.001)
 − 0.0160
(0.010)
 − 0.0032*
(0.002)
Village elevation (m) 0.0006
(0.000)
0.0001
(0.000)
  
  1. 1. AME for "ever grown": average marginal effect on the probability that a household had ever grown C88
  2. 2. AME for "stopped": average marginal effect on the probability of disadopting given a household had ever grown C88
  3. 3. Level of significance: "***" 1%; "**" 5%; "*" 10%