A useful link relating to factors influencing long-run AS

http://www.bbc.com/capital/story/20190206-swedens-surprising-rule-for-time-off

See below where to find the relevant sections within the spec:

Edexcel spec reference 2.3.3  b) Factors influencing long-run AS

AQA spec reference 4.2.2.2 The factors which affect long-run AS

OCR spec reference P23 Explain policies which are used to increase the quality or quantity of factors of production,