Equation 3 · Part 1 · Who Builds 2100? The Demographic Engine of Technological Evolution
Symbol phi
What this part means
phi is a part of this expression. Its role is fixed by the surrounding article and by the operations shown in the formula.
Its job in the formula
phi is a part of this expression. Its role is fixed by the surrounding article and by the operations shown in the formula.
Full expression→Symbol phi→Article meaning
The passage around this formula
where n is the growth rate of the population of researchers, measures how much easier or harder each new idea makes the next one to find (values below 1 are required for the model’s growth path to be stable at all — the discipline’s own name for this is diminishing returns to knowledge accumulation), and measures how much duplicated research…
Learn the underlying idea
A variable is a named place for a value. Its letter is a local label: x can mean position in one formula and a data point in another.
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Sources cited in the article section
- [3] Are Ideas Getting Harder to Find? ↗
- [4] The Past and Future of Economic Growth: A Semi-Endogenous Perspective ↗
These citations provide research context; check each source for the exact claim it supports.