Table 2.

Self-selection into process/product innovations: marginal effects

VariablesProcess innovationsProduct innovationsBothProcess innovationsProduct innovationsBoth
TFPit−20.0042*** (0.0016)0.0007* (0.0004)0.00009* (0.00006)0.0038* (0.0026)0.00004* (0.00003)0.00005* (0.00003)
Process in.it−2    0.05690*** (0.0046) 
Product in.it−2   0.2425*** (0.0129)  
Sizeit−20.0232*** (0.0016)0.0010*** (0.0003)0.0017*** (0.0003)0.0227*** (0.0016)0.0021*** (0.0010)0.0004*** (0.0001)
Xit−20.0028 (0.0043)0.0002 (0.0007)0.0002 (0.0006)0.0033 (0.0044)0.0002 (0.0003)0.0002 (0.0002)
Mit−2−0.0046 (0.0046)0.0001* (0.0007)0.0006 (0.0006)−0.0052 (0.0047)0.0027 (0.0026)0.0001 (0.0002)
R&Dit−20.0015 (0.0040)−0.0002 (0.0042)−0.0001 (0.0034)0.0013 (0.0022)0.0001 (0.0016)0.0000 (0.0001)
Year/sector dummiesYESYES
N. observ.20,58220,582
Log-L−4,213.855−3987.559
ρ0.427*** (0.047)0.852*** (0.021)
Wald test ρ = 0
χ2
214.683
212.353
p-value0.0000.000

Notes:

We report cluster adjusted standard errors. *** and * indicate significance at the 1 and 10%, respectively

Source: Authors’ own work
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