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

# 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)