Table 8.2 shows the variables used in this example.
Table 8.2: Variables
|
Variable Name |
Interpretation |
|---|---|
|
|
1 if mine is open in that year; 0 otherwise |
|
|
1 if mine is worked in that year; 0 otherwise |
|
|
Amount of ore extracted per mine per year |
|
|
Amount of ore extracted per year |