add_labels: Function for adding a row with treatment labels for the...
In mikajoh/selshare: Research Compendium for the Selective Sharing Project

Function for adding a row with treatment labels for the figures.

1	add_labels(amce, labels = selshare::treat_labs())

`amce`	Estimates from `amce()`.
`labels`	The dataframe containing the labels. It expects a column `treatment` corresponding to the treatment variables and a column `treatment_label` with their labels. Defaults to `selshare::treat_labels()`, which is included in the compendium.