In any given neighbourhood, if people are perfectly free to choose and change occupations, the total advantages and disadvantages (including wages and profits) of different employments of labour and stock must be equal, or constantly tending toward equality, because self‑interested workers and capitalists will move into more advantageous employments and out of less advantageous ones until the advantages level out.

By Adam Smith, from La Richesse des nations

Key Arguments

  • If one employment in the same neighbourhood were clearly more advantageous than others, many people would crowd into it, increasing competition there and reducing its advantages toward the common level.
  • If one employment were clearly less advantageous, people would desert it, reducing competition there and increasing its advantages toward the common level.
  • This dynamic equalization presupposes a society 'where things were left to follow their natural course, where there was perfect liberty, and where every man was perfectly free both to choose what occupation he thought proper, and to change it as often as he thought proper.'
  • Individual self‑interest drives the process, since 'Every man’s interest would prompt him to seek the advantageous, and to shun the disadvantageous employment.'

Source Quotes

The whole of the advantages and disadvantages of the different employments of labour and stock, must, in the same neighbourhood, be either perfectly equal, or continually tending to equality. If, in the same neighbourhood, there was any employment evidently either more or less advantageous than the rest, so many people would crowd into it in the one case, and so many would desert it in the other, that its advantages would soon return to the level of other employments.
The whole of the advantages and disadvantages of the different employments of labour and stock, must, in the same neighbourhood, be either perfectly equal, or continually tending to equality. If, in the same neighbourhood, there was any employment evidently either more or less advantageous than the rest, so many people would crowd into it in the one case, and so many would desert it in the other, that its advantages would soon return to the level of other employments. This, at least, would be the case in a society where things were left to follow their natural course, where there was perfect liberty, and where every man was perfectly free both to choose what occupation he thought proper, and to change it as often as he thought proper.
If, in the same neighbourhood, there was any employment evidently either more or less advantageous than the rest, so many people would crowd into it in the one case, and so many would desert it in the other, that its advantages would soon return to the level of other employments. This, at least, would be the case in a society where things were left to follow their natural course, where there was perfect liberty, and where every man was perfectly free both to choose what occupation he thought proper, and to change it as often as he thought proper. Every man’s interest would prompt him to seek the advantageous, and to shun the disadvantageous employment.
This, at least, would be the case in a society where things were left to follow their natural course, where there was perfect liberty, and where every man was perfectly free both to choose what occupation he thought proper, and to change it as often as he thought proper. Every man’s interest would prompt him to seek the advantageous, and to shun the disadvantageous employment. Pecuniary wages and profit, indeed, are everywhere in Europe extremely different, according to the different employments of labour and stock.

Key Concepts

  • The whole of the advantages and disadvantages of the different employments of labour and stock, must, in the same neighbourhood, be either perfectly equal, or continually tending to equality.
  • If, in the same neighbourhood, there was any employment evidently either more or less advantageous than the rest, so many people would crowd into it in the one case, and so many would desert it in the other, that its advantages would soon return to the level of other employments.
  • This, at least, would be the case in a society where things were left to follow their natural course, where there was perfect liberty, and where every man was perfectly free both to choose what occupation he thought proper, and to change it as often as he thought proper.
  • Every man’s interest would prompt him to seek the advantageous, and to shun the disadvantageous employment.

Context

Opening of Chapter X, where Smith sets out a general equilibrium principle for wages and profits across different employments under the assumptions of perfect liberty and free occupational choice.