Perhaps you should try some spelling variations:
"behavioural economics" » "behavioral economics"
"behavioral economic" » "behavioral economics"
"behavioral ecology" » "behavioral 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 ecology"))) OR ("behavioural economics")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"behavioral economic\") OR (\"behavioral ecology\"))) or (\"behavioural economics\"))".
• Removing quotes may allow a broader search: (((( behavioral economic ) OR ( behavioral ecology ))) or ( behavioural economics )).
• Adding a wildcard symbol may retrieve word variants: (((("behavioral economic") OR ("behavioral ecology"))) or ("behavioural economics"))*.