When selecting a (independent, dependent) variable, or a reference period, dynamically update the available options. For example, a dataset might not have observations for some reference periods, so, the those periods should be disabled/removed from the drop down menu.
When selecting a (independent, dependent) variable, or a reference period, dynamically update the available options. For example, a dataset might not have observations for some reference periods, so, the those periods should be disabled/removed from the drop down menu.