Business
Theory of the firm
The Make-or-Buy Decision
Also known as Make-or-buy decision, Outsourcing, Vertical integration
Every company faces a simple-sounding question all day long: do we make this ourselves, buy it from someone, or partner up? The answer draws the real border of the firm, the same way a cell's membrane decides what stays in and what stays out. Biology figured this out first: the cell and molecular biology show why a boundary that lets the right things through is what keeps a living thing alive, and your gut microbiome is basically a partnership with trillions of outsourced helpers. Even families in sociology run on this logic, splitting who does what inside the household versus who they call for help.
Key people
- Bengt HolmströmFinnish economist and Nobel laureate
- Michael JensenAmerican economist
Read
- The theory of the growth of the firmEdith Tilton Penrose · 1959Book
- The economics of discretionary behaviorOliver E. Williamson · 1964Book
- Entrepreneurial Theory of the FirmFrederic Sautet · 2000Book
- Problem of ProductionPer L. Bylund · 2015Book
Listen
- Theory Of The Firm JFK Economist by Emilio Castelazo and Santiago CamaraEMILIO CASTELAZO PARRAPodcast
- Lawyer Marketing FAQ - The Firm Theory PodcastMark MillerPodcast
- Takk og lov – med Anine KierulfJuristenes Utdanningssenter og JuridikaPodcast
- The EPM Show: All Things Enterprise Performance ManagementBlake BozarthPodcast
By the numbers
- 118.4TWorld GDP (US$) — global, 2025 (World Bank)
- 3Global inflation — global, 2025 (World Bank)
Debates
- Is profit maximization the sole objective of a firm?One view: Yes, firms primarily aim to maximize profits for their owners or shareholders. · Another: No, firms often balance profit with other goals like market share, social responsibility, or employee welfare.Open question
- Should firms prioritize shareholders or stakeholders?One view: Firms should prioritize shareholders as they own the company and bear the financial risk. · Another: Firms should prioritize all stakeholders, including employees, customers, and the community, for long-term sustainability.Open question
Glossary
- FirmAn organization that produces goods or services for sale.
- Profit MaximizationThe process by which a firm determines output and price levels to achieve the highest possible profit.
- RevenueThe total income generated by a firm from its sales of goods or services.
- CostThe expenses incurred by a firm in producing goods or services.
- Market StructureThe characteristics of a market, such as the number of firms and type of competition.
- Economies of ScaleCost advantages that firms obtain due to increased production, leading to lower average costs.
Careers
Roles this can lead toward
Student research
Published policy papers by One Young India delegates — every delegate leaves published under their own name.
Threads 3
Where this connects to other fields — and why it's worth knowing.
- Kinship & Family Sociology
For most of history, businesses were run by families, and not because relatives are especially good at it. Back then a deal with a stranger couldn't be enforced in any court, but you could trust your cousin not to rob you. Family was the original trust technology that made trade possible at all.
- The Microbiome Health
Companies constantly decide whether to make something themselves or buy it from a supplier. Evolution made the same call inside your gut: humans lost the ability to build vitamins B12 and K, so we outsource them to bacteria living in our intestines. There's a make-or-buy business boundary drawn right through your belly.
- The Cell & Molecular Biology Science
Companies always face a choice: build a skill in-house or just buy a company that already has it. Life made that call billions of years ago. An ancient cell 'bought' a free-living bacterium to handle energy instead of evolving its own power plant, and that captured helper became the mitochondria in your cells right now.