Perhaps you should try some spelling variations:
"behavioral economic" » "behavior economic"
"behavioral economics" » "behavior economics"
"behavioral ecology" » "behavior ecology"
"behavioural economics" » "behaviour economics"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: (((((("behavioral economic") OR ("behavioral economics"))) OR ("behavioral ecology"))) OR ("behavioural economics")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((((\"behavioral economic\") OR (\"behavioral economics\"))) or (\"behavioral ecology\"))) or (\"behavioural economics\"))".
• Removing quotes may allow a broader search: (((((( behavioral economic ) OR ( behavioral economics ))) or ( behavioral ecology ))) or ( behavioural economics )).
• Adding a wildcard symbol may retrieve word variants: (((((("behavioral economic") OR ("behavioral economics"))) or ("behavioral ecology"))) or ("behavioural economics"))*.