The dual-sector model is a model in developmental economics. It is commonly known as the Lewis model after its inventor Sir William Arthur Lewis, winner of the Nobel Memorial Prize in Economics in 1979. It explains the growth of a developing economy in terms of a labour transition between two sectors, the capitalist sector and the subsistence sector.
Read more about Dual-sector Model: History, Assumptions, Surplus Labour and The Growth of The Economy, Capital Accumulation, Criticism, Empirical Tests and Practical Application of The Lewis Model
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“The playing adult steps sideward into another reality; the playing child advances forward to new stages of mastery....Child’s play is the infantile form of the human ability to deal with experience by creating model situations and to master reality by experiment and planning.”
—Erik H. Erikson (20th century)