Early work undertaken as part of this assessment has drawn on regional analysis published by the Institute for Fiscal Studies (IFS) following the UK Government Spending Review.
Mae gwaith cychwynnol ar yr asesiad hwn wedi tynnu ar ddadansoddiad a gyhoeddwyd gan y Sefydliad Astudiaethau Cyllid (IFS) yn dilyn Adolygiad o Wariant Llywodraeth y DU.