This is a very helpful explanation of the fields in EconLit database records and explanations of special American Economics Association fields for Subject Descriptors, Subject Codes,Geographic Codes, etc. These codes enhance searching of EconLit.
Most codes are searchable in the drop-down menus under "Select a Field" search boxes. Others are found in the "Limit" search boxes. Others are included as Indexes. In case you're wondering, "Festschrift" means a collection of writings.
These screen shots show the "Indexes" search boxes in EconLit. The Indexes might be useful in fine tuning some searches. Indexes include the American Economics Association Subject Descriptors and Subject Codes.