These changes and benefits were found to largely have been sustained a year after they were first reported, and some represented substantial improvements in businesses’ performance.
Canfuwyd bod y newidiadau a’r buddion hyn wedi’u cynnal i raddau helaeth flwyddyn ar ôl iddynt gael eu hadrodd gyntaf, a bod rhai yn welliannau sylweddol ym mherfformiad busnesau.