the distribution of planned and actual donations for a particular year
the difference in these for the (minority subset) of individuals who reported in subsequent years
current vs future donation plans.
Depending on your reading of the data, it possibly suggests that people tend to ‘plan to donate’ more than they ‘actually donate’. But that might not be an effectiveness-specific observation.
By the way, one interesting ‘data anecdote’; in our recent donations post for the EA Survey we compare
the distribution of planned and actual donations for a particular year
the difference in these for the (minority subset) of individuals who reported in subsequent years
current vs future donation plans.
Depending on your reading of the data, it possibly suggests that people tend to ‘plan to donate’ more than they ‘actually donate’. But that might not be an effectiveness-specific observation.