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\u201cThe edifice of economic theory constructed over the last two centuries, to an extent in the shadow of physics, has been refuted time and again.\u201d<\/i> \u2014 Michael Batty, <\/span>Inventing Future Cities<\/i><\/span><\/strong><\/p>\n Everywhere you turn in today\u2019s housing debates, you\u2019ll hear the familiar refrain: build more, and prices will fall. It\u2019s the economic theory of supply and demand\u2014so simple it can be drawn on the back of a napkin. On one axis, demand. On the other, quantity. One curve slopes down; the other, up. Where they meet, you find equilibrium\u2014the point where the market clears.<\/span><\/p>\n But real-life housing doesn\u2019t behave like a tidy graph. It\u2019s more like a crowded city intersection: messy, unpredictable, shaped by rules, habits, and histories that don\u2019t always follow logic. This article traces the origins of supply and demand theory, unpacks why it became the dominant frame in economic thinking, and explores why applying it wholesale to housing can obscure more than it reveals.<\/span><\/p>\n Let\u2019s begin.<\/span><\/p>\n Long before the supply-and-demand graph became the icon of modern economics, thinkers were trying to understand what gives something value. Aristotle distinguished between “use value” and “exchange value.” John Locke<\/span><\/a>, writing in the 17th century, argued that value was tied to labour and scarcity\u2014themes that echo in modern supply theory. Richard Cantillon<\/span><\/a>, an Irish-French economist, noted how prices in markets respond to abundance and scarcity, hinting at the \u201cinvisible hand\u201d of market dynamics.<\/span><\/p>\n By the late 1700s, Adam Smith<\/span><\/a> described how market prices fluctuate around a “natural price” based on the costs of production. But Smith, like others of his time, was as much moral philosopher as economist. He recognized that markets operated within broader social systems\u2014a view that would recede as economics became more formalized.<\/span><\/p>\n The 19th century ushered in efforts to make economics look more like physics\u2014orderly, mathematical, predictive. Thinkers like Jean-Baptiste Say<\/span><\/a>, David Ricardo<\/span><\/a>, and John Stuart Mill<\/span><\/a> built the foundations of classical economics. Say famously argued that “supply creates its own demand,” a claim that would face heavy criticism during economic downturns.<\/span><\/p>\n The breakthrough came with the “marginal revolution” of the 1870s. William Stanley Jevons<\/span><\/a>, Carl Menger<\/span><\/a>, and L\u00e9on Walras<\/span><\/a> introduced the idea that value depends on marginal utility\u2014the additional satisfaction from consuming one more unit of something. Walras took it further, creating a general equilibrium model that showed how all markets could theoretically balance through prices.<\/span><\/p>\n Then came Alfred Marshall. In 1890, he published Principles of Economics<\/i> and gave us the familiar supply-and-demand diagram. It was elegant, intuitive, and portable. The curves, he argued, could be used to understand prices for all sorts of goods\u2014from bread to housing.<\/span><\/p>\n Marshall\u2019s model caught on, in part because it fit neatly into a world increasingly organized around markets. By the 20th century, economics textbooks, policymakers, and pundits alike leaned heavily on the supply-and-demand framework. It became a kind of common sense: when prices are high, supply must be too low; build more, and things will become affordable.<\/span><\/p>\n But this model makes strong assumptions: that buyers and sellers have equal information, that competition is healthy, that goods are interchangeable, and that markets naturally move toward balance. In the case of housing, these assumptions often fall apart.<\/span><\/p>\n Some readers might worry that this critique throws out basic economics. It doesn\u2019t. Supply and demand help explain parts of the picture\u2014especially for short-term shifts or specific segments.<\/span><\/p>\n But housing doesn\u2019t operate in a vacuum. It\u2019s embedded in regulation, culture, and inequality. Acknowledging these realities strengthens the model rather than undermining it.<\/span><\/p>\n Housing isn\u2019t a simple commodity. You can\u2019t box it, ship it, or substitute one unit for another with ease. A condo in downtown Vancouver isn\u2019t interchangeable with a family home in rural Manitoba. Housing is deeply tied to location, community, services, and infrastructure. It\u2019s shelter, but also status, investment, and identity, to name just a few.<\/span><\/p>\n To use a metaphor: treating housing like a commodity is like trying to apply the rules of checkers to a chessboard. You might recognize some patterns, but the game is far more complex\u2014and the stakes are much higher.<\/span><\/p>\n Demand for housing isn\u2019t just about need\u2014it\u2019s shaped by financial speculation, tax policy, zoning laws, mortgage rates, and global capital flows. Supply, meanwhile, is slow to respond. It takes years to build new homes, and developers often build for profit, not for need. If returns aren\u2019t high enough, supply doesn\u2019t materialize\u2014regardless of demand. Rising construction costs, labour shortages, and supply chain issues add further friction.<\/span><\/p>\n Critics may rightly point out that regulatory barriers\u2014like restrictive zoning and long permitting timelines\u2014do limit supply. That\u2019s true. But deregulation alone<\/i> won\u2019t ensure affordability if the new supply is aimed at investors or luxury buyers. Supply matters, but so does what gets built, where, and for whom.<\/span><\/p>\n And while this article focuses on market structures and distortions, it’s important to acknowledge that immigration and demographic growth are real drivers of housing demand. In a growing country like Canada, more people mean more households\u2014and more need for places to live. But even this demand interacts with financial, regulatory, and speculative forces in ways that the supply-demand graph can\u2019t capture on its own.<\/span><\/p>\n There\u2019s a more foundational issue at play\u2014one that classical economists like Ricardo understood clearly: urban land is not like other commodities<\/i>. It\u2019s not produced; it\u2019s simply owned. Land is a factor of production alongside capital and labour, but it\u2019s the only one that is non-productive<\/i> in itself. And because of this, any unregulated gains in land value\u2014especially in urban settings\u2014can absorb all the benefits of economic growth.<\/span><\/p>\n This matters profoundly for housing.<\/span><\/p>\n As cities grow and invest in public infrastructure, nearby land values rise. But without mechanisms to capture or redistribute that value\u2014such as land value taxes\u2014it accrues to landowners, not the public. In this way, speculation in land acts like a sponge, soaking up the gains of productivity, public investment, and even new housing supply.<\/span><\/p>\n When land speculation drives the market, more building doesn’t necessarily translate into more affordability. The rising value of land can cancel out the benefits of increased housing supply, especially if it encourages landowners to hold out for higher future returns. In essence, land becomes a bottleneck<\/i><\/span><\/a>\u2014a friction in the system that supply-and-demand curves fail to account for.<\/span><\/p>\n Importantly, the supply-and-demand model assumes that markets tend toward equilibrium. But housing markets often do the opposite.<\/span><\/p>\n Prices can rise even as more units are built. Supply may increase, but not in the segments where people most need homes. \u201cExternalities\u201d\u2014like displacement, environmental costs, and social disruption\u2014aren\u2019t factored into the curve.<\/span><\/p>\n Moreover, housing is increasingly financialized. It\u2019s bought and sold not just as shelter, but as a global asset class. That means housing responds less to local need and more to global investment cycles. A vacant luxury condo still counts as “supply,” even if no one lives in it.<\/span><\/p>\n While under certain circumstances<\/a> some of this supply may<\/i> eventually filter down into the broader market\u2014by relieving pressure on higher-end segments or through resale and rental turnover\u2014this process is often slow, uneven, and does little to address urgent housing need. <\/span><\/p>\n Speculation plays a major role here. When housing is seen as a vehicle for capital appreciation, demand can become decoupled from occupancy. Investors may leave units empty in anticipation of price increases, treating homes more like stocks than shelter. This speculative demand distorts the curve, pushing up prices without increasing access.<\/span><\/p>\n Meanwhile, financial tools like mortgages, REITs, and investment funds have made it easier for capital to flow into real estate markets. This financialization introduces volatility and pulls housing further away from its basic function as a place to live.<\/span><\/p>\n Tax structures and regulatory loopholes<\/a><\/span> also amplify the problem. From preferential treatment of capital gains on real estate to lightly taxed corporate ownership of housing, the system often encourages investment over affordability.<\/span><\/p>\n Land-related taxation comes in many forms. Some target recurring value through property or land value taxes; others capture sudden uplifts through infrastructure levies or upzoning charges. Each has trade-offs, and both are part of the broader toolkit for redirecting land-related gains toward public benefit.<\/span><\/p>\n At the same time, it’s essential to note that even well-intentioned tax mechanisms\u2014such as land value capture\u2014can have unintended consequences if poorly designed, particularly when they burden residents who are not speculating but simply living in areas with rising property values.<\/span><\/p>\n In practice, this ultimately turns the tidy graph on its head: The price doesn\u2019t always reflect scarcity. The supply doesn\u2019t always reflect housing needs. And the demand may have more to do with tax shelters than with families seeking shelter<\/i>.<\/span><\/p>\n As historian Yuval Harari points out<\/span><\/a>, not all chaos is the same. The weather is chaotic but indifferent to our personal forecasts, ultimately making it more predictable. Markets, on the other hand, change because<\/i> we forecast. This is what Harari calls Type 2 chaos<\/i>: systems that become unpredictable precisely because humans are part of them and adapt constantly.<\/span><\/p>\n Housing markets are especially reactive. When people expect prices to rise, they rush to buy, pushing prices up. When investors fear a downturn, they pull out, creating the very slump they feared. This self-reinforcing loop makes housing markets inherently volatile<\/i>\u2014and much harder to model with tidy curves.<\/span><\/p>\n It\u2019s a dynamic that mirrors what anthropologist David Graeber once described<\/span><\/a>: that economic theory increasingly resembles a \u201cshed full of broken tools,\u201d still being used to address problems of a previous century. As Graeber noted, much of what passes as economic common sense\u2014particularly around money, markets, and inflation\u2014survives more through institutional inertia than predictive accuracy.<\/span><\/p>\n This isn\u2019t to say that supply and demand are useless. They can help us understand part of the picture\u2014especially when looking at specific submarkets or short-term price signals.<\/span><\/p>\n But they are tools, not truths<\/i>. And when it comes to housing, they must be used with caution and context.<\/span><\/p>\n Some defenders of the curve will argue that while imperfect, more supply still helps\u2014and that dismissing the model could stall urgently needed construction. That\u2019s a fair concern.<\/span><\/p>\n The key point is this: more housing is necessary, but not sufficient. It matters what kind of housing gets built, who it serves, and how it interacts with broader forces like finance and regulation.<\/span><\/p>\n Alternative economic traditions\u2014such as feminist economics, ecological economics, and institutional economics\u2014offer broader perspectives. They remind us that markets are embedded in society, shaped by power, policy, and place. They treat housing not as a widget, but as a foundation for human life.<\/span><\/p>\n When we look beyond the curve, we open space for better questions: Who is housing for? Who decides what gets built? How do we ensure that homes are homes first\u2014not just investments?<\/span><\/p>\n The supply-and-demand diagram is one of the most recognized images in economics. But when applied too rigidly, it can become a kind of ideological shortcut\u2014obscuring more than it reveals.<\/span><\/p>\n Housing is not just a product. It’s a right, a relationship, a long-term infrastructure, and a reflection of our values. If we want better housing outcomes, we need better tools\u2014ones that see the whole board, not just the lines on a graph.<\/span><\/p>\n ***<\/span><\/p>\n Related Spacing Vancouver pieces:<\/i><\/span><\/i><\/i><\/p>\n **<\/i><\/p>\n Erick Villagomez<\/i><\/b> is the Editor-in-Chief at Spacing Vancouver and teaches at UBC\u2019s School of Community and Regional Planning. He is also the author of <\/i>The Laws of Settlements: 54 Laws Underlying Settlements Across Scale and Culture<\/i><\/span><\/a>.<\/i><\/span><\/p>\n","protected":false},"excerpt":{"rendered":"\n