A maintenance update to kmatch is now available from SSC. Type
Code:
. ssc install kmatch, replace
to install the update. kmatch requires moremata and kdens to be installed, so possibly you will also have to type
Code:
. ssc install moremata, replace
. ssc install kdens, replace
Changes:
  • kmatch eb (entropy balancing) returned balancing weights that were scaled in terms of the number of observations instead of the sum of weights if pweighs or iweights were specified; this is fixed. The wrong scaling did not affect the results of treatment effect estimation, but it lead to erroneous balancing diagnostics in case of ATE.
ben