Useful link relating to mobility and immobility factors – https://www.bbc.co.uk/news/business-46169131

Edexcel spec reference 3.5.2 – The geographical and occupational mobility and immobility of labour

AQA spec reference 4.1.8.6 – Why the immobility of factors of production can lead to market failure.

OCR spec reference P14 – the impact of changes in the occupational and geographical mobility of labour