Variable

Level

1^st difference

Constant

Constant and trend

Constant

Constant and trend

Lnp_flour

2.35 (0)

4.69 (0)

−34.26 (0)^***

−34.78 (0)^***

Lnp_wheat

1.62 (0)

1.04 (0)

−36.62 (0)^***

−37.31 (0)^***