Desk research, comprising a literature review and statistical analysis based on existing data sources, and case studies based on matched sets of towns with differential performance.
Ymchwil ddesg, yn cynnwys adolygiad o’r llenyddiaeth a dadansoddiad ystadegol ar sail ffynonellau data presennol, ac astudiaethau achos ar sail cyfresi cyffelyb o drefi sy'n perfformio'n wahanol.