Policy evaluation device, policy evaluation method, and computer-readable medium that stores policy evaluation program

A policy evaluation method comprising causing one or more computers to:

• acquire history data that includes datasets, the history data being a record obtained when a first policy was implemented;
• generate multiple pieces of segmented data by segmenting the datasets based on at least one requirement related to the first policy remaining unchanged;
• generate a learning model related to a second policy for each of segments by training a machine learning algorithm using each of the pieces of segmented data;
• and
• perform off-policy evaluation for the second policy using an estimated value approximated from each of the pieces of segmented data.

A computer-readable medium that stores a policy evaluation program that causes one or more computers to:

• acquire history data that includes datasets, the history data being a record obtained when a first policy was implemented;
• generate multiple pieces of segmented data by segmenting the datasets based on at least one requirement related to the first policy remaining unchanged;
• generate a learning model related to a second policy for each of segments by training a machine learning algorithm using each of the pieces of segmented data;
• and
• perform off-policy evaluation for the second policy using an estimated value approximated from each of the pieces of segmented data.