Explanation:

All the given factors are responsible for informalisation of labour.

1: Pressure to cut costs: Competition requires that each producer should produce at minimum possible cost of production. In pursuit of lower cost of production, producers opt for improved technology. This technology provides for increasing substitution of labour for capital. Therefore, employers prefer to employ casual labour so that they can be retrenched at will.

2: Rigid labour laws: labour laws do not permit retrenchment of labour. In the controlled protected economy of the past, the producers could afford extra labour and pass on the cost to the consumers. In the emerging competition this luxury is no longer available to them. Therefore, they do not like to employ regular workers.

3 Demand-Supply Imbalance of labour force: That the employers could easily take resort to informalisation is also explained by obtaining demand-supply imbalance in the labour market. When supply of labour exceeds the demand for labour, informalisation increases.