Credit GEP
Demand is easier to achieve in today’s market. It’s time to rethink how the world thinks about supply.
Reading Time: 9 minutes for full analysis + key takeaways highlighted throughout
Refer a Friend - Earn These Rewards
Let’s dive in.
Reference The Art of Demand for part 1 of this series
Supply is the direct counterpart to demand. As an action, supply means providing or making something available for use. As a noun, supply is the amount or stock of something available.
For business owners, supply directly influences profitability and long-term survival. Understanding supply cost structures, production bottlenecks, and supply dependencies helps businesses price products effectively and spot shifts in supply dynamics. Understanding marginal costs prevents overproduction and eroding profit margins.
Recognizing supply vulnerabilities, for instance, the reliance on single-source raw materials or long lead times, allows companies to instigate plans of action to mitigate risks from geopolitical shocks, logistics disruptions, or raw material shortages.
Price rarely depends on consumer demand alone; it sits at the intersection of supply and demand. Sharp price spikes often stem from sudden supply shifts rather than shifts in consumer preferences and demand. For example, severe weather that impacts crop production or geopolitical conflicts that disrupt oil supply can drive up prices even when demand remains static.
High prices signal to potential market entrants that the market is under-supplied, attracting capital and labor. In contrast, falling prices signal oversupply, prompting sources to reallocate elsewhere as competitors leave the market.
On a macro level, governments and central banks rely on supply analysis to design effective policies and avoid unintended consequences.
Inventors use supply concepts to identify opportunities and protect purchasing power.
No matter where you are in the supply chain or how you interact with supply, understanding it is fundamental because it governs how an economy prices, allocates, and produces resources, goods, and services.
The Law of Supply
In economics, the “Law of Supply” is a fundamental principle (complementary to the “Law of Demand”) that states that, all else equal, as the price of a good or service increases, the quantity supplied increases.
Conversely, as the price decreases, the quantity supplied decreases. Thus, price and quantity supplied have a direct (positive) relationship.
Intuitively, this is understandable. If the price of hot dogs increases (generally due to higher demand), hot dog suppliers will want to supply more to earn more revenue. Alternatively, new suppliers may enter the market to augment existing supply.
How do they know the Law of Supply holds in most/all scenarios?
Producers are primarily driven by profit incentives and cost structure dynamics.
Higher market prices mean higher potential revenue per unit sold. If production costs remain constant, a higher selling price increases profit margins and incentivizes suppliers to expand production.
Producing additional units in the short term often becomes progressively more expensive due to diminishing marginal returns (e.g., paying workers overtime, running machinery past optimal capacity with minimal downtime). Higher prices often cover these increased costs, making the extra supply profitable.
As market prices for a good or service rise, outside companies are attracted to the industry by the prospect of above-average profits, adding to total market supply over the long term.
For existing market suppliers, understanding existing capacity metrics and scalability is crucial to future planning. If prices increase, what is your business’s capacity to create incremental supply?
For instance, if the price of a haircut increased, what is a barbershop’s capacity to scale? Do they need additional square footage? Do they need additional headcount? Do they need additional equipment?
If the price were to decrease, what is your business’s capacity to flex and slow down on supply?
In these circumstances, you can cut variable costs to some extent, whereas operating expenses are generally harder to reduce. You can buy fewer inputs for your bakery (less flour and chocolate chips), but you can’t easily get out of your 12-month lease.
For business owners, identifying your actual supply curve and recognizing and addressing production bottlenecks early can enable quick action and faster scaling.
Price Driven Supply Constraints
How easily does supply respond to price changes?
Economists have studied this concept for years and developed the price elasticity metric, which measures how sensitive the quantity supplied of a good or service is to a change in its price.
The Law of Supply tells us the direction of a producer’s response (if price goes up, quantity supplied goes up); elasticity tells us the magnitude—how much quantity supplied changes when price moves.
Mathematically, price elasticity of supply is calculated as the percentage change in quantity supplied divided by the percentage change in price. Because price and quantity supplied move in the same direction, price elasticity of supply is almost always positive.
The value of the price elasticity of supply (“PES”) unveils secrets about market dynamics:
If PES = 0: Quantity supplied cannot change at all, regardless of price changes. For example, the supply of stadium tickets does not change as the price increases.
If PES < 1: Quantity supplied changes by a smaller percentage than the price changes. For example, as the price of electricity increases, the supply of electricity increases (but by a smaller percentage than the price increase, as there is a lag in creating new electricity supply).
If PES = 1: Quantity supplied changes by the exact same percentage as the price change.
If PES > 1: Quantity supplied changes by a larger percentage than the price change. For example, as the price of mass-produced manufactured goods increases, the quantity supplied increases by more (as a % basis) than the price increased.
If PES = Infinity: Producers will supply an infinite quantity at a specific price, but zero at any lower price. For example, digital software downloads have near-zero marginal reproduction cost.
Each product and service exhibits a different, unique elasticity. Why are some goods elastic while others are inelastic?
Four primary factors dictate how quickly suppliers can ramp production up or down: time horizon, availability of inputs and resources, space capacity and excess inventories, and flexibility and ease of mobility.
In the immediate term, and often in the short term, supply is almost fixed. A farmer bringing tomatoes to his distributor today cannot immediately supply more tomatoes if the market price doubles at 9 am. In the short run, plant capacity is fixed (square footage is fixed), but firms can increase labor or raw materials. In the long run, firms can build new factories, hire workers, and enter or leave the industry, making supply significantly more elastic.
If production relies on rare inputs (e.g., uranium, rare earth minerals), supply is more inelastic. If inputs are generic (e.g., flour, paper, stainless steel), supply is more elastic.
A factory operating at 50% capacity with stockpiled inventory can quickly scale output when prices rise (PES > 1). A plant running at 100% capacity faces a bottleneck (PES < 1).
If production processes can easily shift between goods (e.g., a bakery switching between baking bread and pastries based on price), supply is highly elastic.
If, if, if, if.
Each supply setup, each business, every situation is unique. To succeed and accurately predict supply dynamics, you must understand each of these aspects (and more).
Factors Shifting Supply
Two major types of factors cause the quantity of a good or service in the market to fluctuate. First, the quantity supplied moves along the supply curve. This is simply based on a price change, which subsequently increases or decreases supply. In this case, the supply curve has not moved; the equilibrium point between supply and demand has simply moved along the curve.
Second, the supply curve itself can shift.
What forces are causing the supply curve to shift?
Changes in Input Prices: As production costs rise because of raw materials, labor, energy, equipment, rent, or other factors, supply is directly affected. As input costs rise, the supply curve shifts to the left (higher costs reduce profits and encourage lower output).
Technological Advances: Improvements in production processes, machinery, or software increase efficiency, shifting the supply curve to the right.
Government Policies: Interventions by local, national, or international authorities directly alter production economies. For instance, subsidies shift the supply curve right. Per-unit taxes shift the supply curve to the left.
Producer Expectations About Future Prices: Suppliers adjust current production based on anticipated market conditions. Higher expected future prices shift supply left (holding back inventory to sell at higher predicted prices tomorrow).
Number of Sellers in the Market: As the number of sellers in a market increases because new competitors enter the industry, total market capacity rises and supply shifts right.
Prices of Related Goods in Production: Increasing output for a primary good naturally boosts the supply of its byproduct. For example, increasing beef production to rebuild national herd counts automatically shifts the leather supply curve to the right.
Natural & External Conditions: Unforeseen physical or environmental disruptions outside a firm’s direct operational control, including weather, disaster, war, pandemics, and more.
For everyday business operators, macroeconomic factors and others, including input inflation, labor market shifts, supply chain disruptions, and technological breakthroughs, can redefine unit economics overnight.
Thus, for each business owner, building supply and supply chain resilience through supplier diversification, technology-driven productivity gains, and hedging strategies enables greater stability and predictability.
Without measures to mitigate supply shocks, operators are at the mercy of broader market conditions. By building intentional safeguards to reduce supply risks, proactive business owners can plan more easily for the future and support long-term success.
Unique Supply Scenarios Every Operator Should Know
Every situation presents its own operational constraints and variables to consider. No true one-size-fits-all approach exists for supply.
Scenarios share commonalities that lead to the law of supply, supply curves, and elasticity principles, but many factors can still influence supply outcomes.
For instance, in a monopoly scenario, a single seller faces high barriers to entry. Traditionally, in a competitive market, total supply depends mainly on price (i.e., each price corresponds to a unique total quantity supplied).
In a monopoly, however, no single supply curve exists. To sell an additional unit, a monopolist must lower the price on all units sold. Depending on the price elasticity of demand, a monopolist can supply the same quantity at different prices or different quantities at the same price.
In an oligopoly, a few dominant firms (e.g., Boeing and Airbus) constitute the entire market supply. Each firm’s supply decision depends directly on its rivals’ anticipated reactions.
Firms choose output strategically:
According to Cournot: Firms simultaneously choose quantities, arriving at a Nash equilibrium where total market supply is higher than the monopoly quantity but lower than perfect competition.
According to Bertrand: Firms compete on price, driving prices down to approach perfectly competitive pricing outcomes (especially if products are similar/exactly similar)
According to the Cartel Model: Firms explicitly (or implicitly) collude to act as a single monopoly to restrict overall supply and maximize joint profits.
Regardless of the supply dynamics, business operators must position their businesses to surpass commodity-like pricing competition through strategic supply differentiation, diversification, or cost leadership.
Often, supply and sales are two sides of the coin, separated and distinct functions that rarely, if ever, talk with one another. Combining operational capacity metrics with product differentiation strategy and sales positioning can help protect profit margins against market-wide supply swings.
Understanding supply dynamics, predicting future conditions, and preparing for optimal and sub-optimal scenarios increases a business’s chance of success (from a supply angle) and is critical in the 21st century.
Traditionally, economics focused heavily on demand because it was difficult to predict, attract, and retain. Now, in the 21st century, demand seems widespread and easier to attain.
Supply to meet demand is much harder to come by, especially supply that can generate strong margins given current demand conditions.
These factors, and many more, make supply a critical science for every business owner to understand.
That’s a wrap on this deep dive.
Drew Jackson
Founder & Writer
Found this analysis valuable? The best way to support Brainwaves is to share it with someone who’d benefit from these insights.
Refer a Friend
Building this community has been one of the most rewarding parts of writing Brainwaves. If you know someone who’d enjoy these weekly deep dives, I’d love it if you could share your unique referral link with them. You’ll earn tangible rewards for growing our community, and they’ll get content worth their time. Win-win.
Keep Exploring
Next Deep Dive: Year 3 In Review - November 25th, 2026
This Saturday: Weekly roundup of breaking developments across energy, space, venture capital, economics, intellectual property, and philosophy
Previous Editions: View the archive here
New to Brainwaves? Join hundreds of readers getting bi-weekly deep dives into the forces reshaping our world.
Sponsor This Newsletter: Reach an engaged audience of forward-thinking readers. Email us for details.
Disclaimer: Views expressed are personal opinions, not financial advice. This content is educational only. Investment decisions carry risks - always consult professionals and do your own research. All sponsorships are clearly disclosed.
© 2026 Brainwaves. All rights reserved.