Complex sentence: From 1971--72 he worked at the Institute of Economics and Statistics at Oxford University, the moved to the Organization for Economic Co-operation and Development in Paris, where he served until 1978, before returning to the RBA.
Split into simpler sentences: From 1971--72 he worked at the Institute of Economics and Statistics at Oxford University. Following this, he then moved to the Organization for Economic Co-operation and Development in Paris, where he served until 1978, before returning to the RBA.