The Very Long Run: When Everything Can Change
Time Horizons in Economics: Short, Long, and Very Long
Economists divide time into different horizons to make analysis easier. Each horizon is defined by what can and cannot change. Imagine you are running a lemonade stand. The time it takes to make different decisions can be classified into these periods.
| Time Period | What Can Change? | Lemonade Stand Example |
|---|---|---|
| Short Run | At least one factor is fixed (usually capital, like equipment). You can only change variable inputs like labor and raw materials. | You have one lemonade stand. You can hire more friends to squeeze lemons (labor) and buy more sugar (materials), but you cannot build a second stand today. |
| Long Run | All factors of production (land, labor, capital) are variable. No fixed factors. Firms can enter or exit the industry. | You can build three more lemonade stands, buy industrial juicers, and hire a manager. Other kids see your success and start their own stands in the neighborhood. |
| Very Long Run | Everything can change: All factors PLUS technology, regulations, social norms, and consumer tastes. The fundamental "rules of the game" transform. | A company invents a perfect, synthetic lemonade powder that is cheaper and healthier. The city bans single-use cups. People suddenly prefer coconut water. Your entire business model must be reinvented from scratch. |
The key difference is that in the Long Run, you work within the existing system. In the Very Long Run, the system itself changes. It's the difference between making the best typewriter in the world (Long Run) and the world shifting to personal computers (Very Long Run).
The Engines of Change in the Very Long Run
What are the "key external inputs" that can change in the Very Long Run? They are the powerful forces that reshape our world over decades and centuries.
1. Technological Progress
This is the most dramatic driver. Technology doesn't just help us do old things better; it lets us do entirely new things. Its effect can be modeled by thinking of it as a multiplier that makes all our inputs more productive. A simple production function[3] is:
$Output = A \times f(Labor, Capital)$
Here, $A$ represents technology (Total Factor Productivity). In the Very Long Run, $A$ isn't just a number that grows slowly; it can leap, causing revolutionary change. The shift from horse-drawn carriages to automobiles, from letters to email, or from fossil fuels to solar power are all Very Long Run technological shifts.
2. Regulatory and Institutional Change
Laws and rules set the boundaries for economic activity. In the Very Long Run, these boundaries can be redrawn. Examples include:
- Environmental Regulations: Laws limiting pollution can force the decline of coal power and spur the rise of renewable energy industries.
- Trade Agreements: Opening borders to free trade can allow a country to completely change what it produces, moving from farming to advanced manufacturing.
- Property Rights: Establishing clear ownership over ideas (patents) or digital assets can create entirely new markets.
3. Societal and Demographic Shifts
People change. Over a very long period, population size, age structure, education levels, and cultural values evolve. An aging population might shift an economy's focus from building schools to building hospitals and retirement homes. A growing concern for health can decimate the sugar industry and create a boom for fitness trackers and plant-based foods.
From Horse Carts to Electric Cars: A Very Long Run Story
Let's trace a concrete example to see all these forces in play: personal transportation.
Circa 1900 (The "Long Run" Equilibrium): The horse-drawn carriage industry was in its Long Run. Companies could adjust all factors: buy more land for stables, hire more drivers, build more carriages. The technology (animal power) and regulations (manure cleanup laws) were relatively stable constraints.
The Very Long Run Shock–Technology: The internal combustion engine was invented and improved. This wasn't a better horse; it was a fundamentally different technology. It changed the required inputs (gasoline instead of hay, mechanics instead of grooms) and the supporting infrastructure (need for roads and gas stations instead of stables).
The Very Long Run Shock–Regulation: Governments started building paved road networks for cars, not carriages. Safety and emissions regulations were created specifically for motor vehicles.
The Very Long Run Shock–Society: People's tastes changed. Cars became symbols of freedom and progress. The geography of cities expanded because people could live farther from work.
Result: The horse-drawn carriage industry didn't just shrink; it was nearly obliterated in its main market. A whole new ecosystem of industries (oil, steel, rubber, auto repair) was born. This is the power of the Very Long Run.
Now, we see it happening again with the shift to electric vehicles (EVs), driven by new battery technology, climate change regulations, and changing consumer preferences. In the Very Long Run, the gas station on the corner might become as rare as a blacksmith's forge.
Thinking in Very Long Run Terms: Why It Matters
Understanding the Very Long Run is crucial for planning and decision-making at all levels.
For Businesses and Entrepreneurs: It encourages thinking beyond the next quarterly report. A company that only focuses on optimizing its current operations (a Long Run activity) might miss a technological tsunami that makes its product obsolete. Successful companies invest in research and development (R&D) to shape or adapt to the Very Long Run. Think of how Netflix moved from mailing DVDs to streaming, a Very Long Run pivot.
For Governments and Policymakers: Policies about education, infrastructure, and research funding are investments in the Very Long Run. Building a fiber-optic internet network or setting ambitious clean energy targets are bets on the shape of the future economy. Investing in basic science education today can lead to technological breakthroughs decades from now.
For Students and Individuals: It highlights the importance of adaptability and lifelong learning. The job you will have in 20 years might not exist today. Skills in critical thinking, problem-solving, and creativity are valuable because they are adaptable, no matter how much technology or regulation changes.
Important Questions
Q1: Is the "Very Long Run" a specific number of years, like 10 or 50?
No, it is not defined by a fixed time. It is defined by the nature of change. For the smartphone industry, where technology evolves rapidly, the Very Long Run might be 5–10 years. For the electricity grid, it might be 30–50 years. It is the time needed for the fundamental conditions of production and consumption to be completely reimagined.
Q2: Can a single event, like a major war or pandemic, trigger a "Very Long Run" change?
Absolutely. Such major shocks can accelerate changes that would otherwise take decades. World War II sped up the development of radar, jet engines, and computers. The COVID-19 pandemic forced rapid adoption of remote work technologies and changed attitudes toward workplace flexibility, potentially altering urban real estate and commuting patterns for the long term. These events break existing patterns and create space for new systems to emerge.
Q3: How can we study something as uncertain as the Very Long Run?
We use tools like scenario planning instead of precise prediction. Scientists and economists create different plausible stories about the future (e.g., "a world of abundant clean energy" vs. "a world facing severe resource constraints"). They then explore how current decisions might play out in each scenario. The goal isn't to pick the right future but to build strategies that are resilient and adaptable across many possible futures.
Footnote
[1] Technology: The application of scientific knowledge for practical purposes, especially in industry. It includes machinery, processes, and digital systems.
[2] Regulation: A rule or directive made and maintained by a government or authority to control the conduct of businesses and individuals within a society.
[3] Production Function: An equation or model that describes the maximum output that can be produced with a given set of inputs (like labor and capital). The simplest form is $Q = f(L, K)$, where $Q$ is quantity of output, $L$ is labor, and $K$ is capital.