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The Official Journal of the Pan-Pacific Association of Input-Output Studies (PAPAIOS)

Table 3 Results of unit root tests

From: An empirical analysis of the determinants of cocoa production in Cote d’Ivoire

Variable

ADF

PP

Ord. of integ.

Level

First diff.

Level

First diff.

(1)

lprod

2.51

− 7.06***

− 2.51

− 8.15***

(1)

llabour

− 1.99

− 8.36***

− 1.19

− 8.57***

(1)

lland

3.18

− 8.55***

− 3.09

− 17.58***

(1)

lnitr

− 1.11

− 8.76***

− 2.12

− 8.59***

(1)

lphos

− 2.79

− 5.14***

− 2.79

− 15.40***

(1)

llco2

− 3.45

− 7.30***

− 3.47

− 10.50***

(1)

  1. The regressions at level and in first difference include trend and intercept
  2. ***Indicates rejection of null hypothesis of non-stationary of the variables at 1% level of significance