Open the brackets choosing the correct word.
1. (Like/unlike) physical capital, human capital is expensive.
2. Individuals can (either/neither) spend their income on consumption (or/nor) save it.
3. In labour markets many aspects are regulated: paid holidays, the length of working day and week and other aspects of the (employment/contribution) relationship.
4. Changing policies (require/vary with) constant updating of statistical systems.