Section 1.Why Invest in Human Capital?
HCE begins from a practical premise: for many workers, the earliest investable base is not a securities account but the health, capability, knowledge, and judgment embodied in the person.
This does not mean that a person is only a machine for production. It puts the worker back at the center of the analysis. Who works? How does the body recover? How is capability formed? What still belongs to the worker after the labor is complete?
The origins of Human Capital ETF are not a straight line from classical economics to four positions. They are a sequence of questions. Can capability be understood as capital? In whom does labor capacity exist? Why are education and training investments? What makes a capability portable? How should one person manage the resulting system under real constraints?
Section 2.Why Human Capital + ETF?
The combination did not begin as wordplay. It began with a change in attention after investment losses.
I had spent serious time allocating financial capital: studying companies, buying stocks, evaluating risk, and trying to improve returns. After losing money, I began to ask whether I had paid enough attention to the most important asset at that stage of life: my own human capital.
The contradiction was plain. I managed financial investments as a portfolio, but treated personal development as disconnected activities: a book, a tool, a course, a writing project, a new platform. Activity was everywhere; a shared allocation logic was missing.
Financial investing asks how money grows. Human-capital investing asks how a person grows.
Human Capital names the center of active investment: health, professional expertise, transferable skills, learning ability, and judgment. ETF names the selected management logic: visible positions, explicit rules, concentration-risk control, long holding periods, and rebalancing as life changes. Externalized artifacts, financial buffers, reputation, relationships, and channels support or extend embodied capital; they should not all be renamed human capital.
How should a person allocate limited time, energy, attention, and money across the different capabilities that shape their future?
Personal origin. This section explains why the author created HCE. The sections that follow describe traditions from which it learns. Personal history and scholarship serve different purposes; neither substitutes for the other.
Section 3.Adam Smith · Capability as Fixed Capital
In Book II, Chapter I of The Wealth of Nations, Adam Smith lists four parts of society's fixed capital: machines, buildings, improvements to land, and the acquired and useful abilities of its members. Education, study, and apprenticeship carry a real cost. The capability that results belongs both to the person's fortune and to society's.
“a capital fixed and realized, as it were, in his person.”
This is more precise than saying that all wealth lies in the person. Smith's narrower claim is that acquired useful ability can constitute fixed capital, and that this capital is realized in the individual.
For HCE, this is the first support. A skill is more than a resume label. When it is formed through real investment, can be used repeatedly, and produces results, it may become an embodied asset retained in the person.
Section 4.Karl Marx · Labour-Power and the Labour Process
Chapter Six of Capital, Volume I does not present a modern theory of human capital. It examines labour-power, or capacity for labor. Marx defines it as the mental and physical capabilities that exist in a person and are exercised in producing a use-value.
“the aggregate of those mental and physical capabilities existing in a human being”
The point is not to rename labour-power as human capital. The concepts belong to different theoretical traditions. Marx asks how labour-power becomes a commodity, is bought, and is used. He also explains that labour-power exists only in the living individual and must be maintained through the means of subsistence.
Chapter Seven adds another connection. Labor does not merely transform an external object. The worker's own powers are exercised and developed through the labor process.
“By thus acting on the external world and changing it, he at the same time changes his own nature.”
For HCE, the indispensable reminder is that capability never floats free of the body. Sleep, health, nourishment, education, practice, and recovery are conditions under which labor capacity continues to exist and develop. A theory of skills that erases the worker's body has removed the principal from the ledger.
Conceptual boundary. Marx did not formulate modern human-capital theory. HCE uses his accounts of labour-power and the labor process only as sources for thinking about embodied capability, maintenance, development, and ownership.
Section 5.Theodore Schultz · Investment in Education and Health
Theodore Schultz treated education, on-the-job training, health, and migration as major forms of investment in human capability.5 He did not simply praise learning. He asked why people sacrifice present earnings and resources to form future productive capability.
For HCE, Schultz moves “invest in yourself” beyond a slogan. Inputs have direct and opportunity costs. Education matters here when it forms capability; health affects the time and capacity available for its use.
Section 6.Gary Becker · General and Firm-Specific Human Capital
Gary Becker's most useful distinction for Human Capital ETF is between general and firm-specific human capital. General training raises productivity across many firms. Specific training raises it more inside the firm that provides it; completely specific training offers no productivity gain elsewhere. Much on-the-job training lies between these poles.6
A company's internal approval system is close to the specific end. Engineering problem decomposition, writing, or programming may be closer to the general end. A proprietary tool can lie between them. Abstracting an internal experience into a portable method can move part of its value toward the general end, provided no confidential information or employer-owned property is taken.
Firm-specific capability is not inferior. It can protect current delivery, credibility, and income. Concentration risk appears when most of a worker's capability depends on one employer or system and loses value outside it.
HCE converts Becker's distinction into a portability rule: protect present delivery, but monitor dependence on one employer and deliberately build capabilities that retain value across settings.
How much of my current capability would remain valuable outside my employer, industry, platform, or country?
Conceptual boundary. Becker's formal distinction is primarily firm-level and continuous rather than binary. Extending the audit to industries, platforms, licensing systems, languages, and countries is an HCE application, not Becker's original portfolio theory.
Section 7.Cost, Decay, and Portability
Human-capital investment consumes more than money. Becker's analysis includes the trainee's time and effort, the time of those who teach, equipment and materials, and present output that could have been produced instead.6 Foregone earnings therefore belong beside direct expenditure when the cost of training is assessed.
An allocation policy should record both kinds of cost without pretending that either produces a universal annual return. Time assigned to one capability cannot be assigned to another. Allocation always contains an opportunity-cost decision.
Capabilities also do not compound indefinitely. Faster obsolescence shortens the period over which an investment can produce value. HCE extends the operational audit to nonuse, changing tools and institutions, impaired health, and lost access to a context. These factors can change value at different rates.
Depreciation should be observed asset by asset, not invented as one annual percentage.
Portability is not permanence. A portable capability can still decay. A specific capability can still be valuable. The portfolio question is not which label is morally better, but how much dependence is deliberate, compensated, maintained, and survivable.
Section 8.The Human Capital ETF Extension
The sources above provide design constraints, not the four-position system itself.
- Smith
- Useful acquired capability can be capital embodied in the person.
- Marx
- Labor capacity remains embodied, must be maintained, and is used within relations of ownership and control.
- Schultz and Becker
- Capability formation consumes direct resources and foregone production.
- Becker
- Capabilities differ in how much value they retain beyond a particular firm.
- Human Capital ETF
- The worker needs a system for protection, allocation, externalization, control, feedback, and rebalancing.
Core, Growth, Distribution, and Meta—and the policy that connects them—are this project's practical extension. They are not direct deductions from Smith, Marx, Schultz, or Becker, and they do not imply endorsement by those thinkers.
Theory explains why capability embodied in people matters. Human Capital ETF asks how a worker can keep part of labor from disappearing at every settlement.
Part III converts these boundaries into a working policy: inventory the ledger, separate asset status from risk, choose one marginal priority, and rebalance only when evidence warrants a change. Continue to Part III: Operating Policy.
Notes.References
- Qiaomai Liu, “Human Capital ETF,” 12 July 2026. Original essay at 69mike.com. ↩
- Adam Smith, An Inquiry into the Nature and Causes of the Wealth of Nations, Book II, Chapter I. Full text at Project Gutenberg. ↩
- Karl Marx, Capital, Volume I, Chapter Six: “The Buying and Selling of Labour-Power.” Full text at Marxists Internet Archive. ↩
- Karl Marx, Capital, Volume I, Chapter Seven: “The Labour-Process and the Process of Producing Surplus-Value.” Full text at Marxists Internet Archive. ↩
- Theodore W. Schultz, “Investment in Human Capital,” American Economic Review 51, no. 1 (March 1961): 1–17. JSTOR stable record; The Royal Swedish Academy of Sciences, “The Prize in Economics 1979 — Press release.” NobelPrize.org. ↩
- Gary S. Becker, “Investment in Human Capital: A Theoretical Analysis,” 1962. NBER chapter page and full chapter; Gary S. Becker, Human Capital: A Theoretical and Empirical Analysis, with Special Reference to Education, First Edition, 1964, NBER book page. ↩ ↩
The personal origin is adapted from the author's essay. Intellectual-history quotations use public English source texts and retain only the short passages required for the argument. HCE applications are marked as extensions rather than attributed to the source authors.