# Oaxaca decomposition - Interpretation Interaction

I am running a Oaxaca decomposition on trends in paid work (similar to this paper) The estimates are expressed in minutes.

The total change shows an increase in about 30 minutes between Period 0 and Period 1. I have some difficulties to understand what the Interaction means here. So the Endowments represent the observed characteristics of my model and the Coefficients the unobserved.

What about the Interaction? How should interpret the fact that it is negative ?

                     Decomposition
Period 0                   174.66
Period 1                   204.15
Total Change               29.5
.
Endowments                  22.78
Coefficients                50.38
Interaction                -43.66