1. The determination of total labor income (TLI) must be understood on a country-by-country basis.
This geopolitical limit is a consequence of the nature of the variables of this determination. Everything that makes a population more or less skilfully industrious affects what the total per capita income is for it, this income per capita being always liable to be more or less different from one country to another.
2. With "=" meaning "is determined by", we have shown that TLI = TI – TPI.
It should be remembered that it is the long-term problem of the distribution of total income that is considered here.
3. By definition of return on placement (ROP), total placement income (TPI) is equal to multiplying ROP by the amount of investment stock (PS).
TPI = ROP x PS
As per the definition of Productivity of placements in capital (PPP):
PS = TI / PP TPI = ROP x (TI / PP)
4. Since TLI = TI – TPI:
TLI = TI – [ROP x(TI/PDP)]
Total labor income (TA) is determined by a difference whose variables are total income (TI), return on placement(ROP) and Productivity of placements in capital (OF).
5. From the equation TLI = TI – [ROP x (TI / PP)] all cases of progression, stagnation and regression of the TLI can be deduced.
In particular, there is an increase in total labor income, TLI, when there is simultaneously:
1) increase in GR, 2) stability in ROP, 3) increase in PP.