Transaction costs are the resources consumed in making an exchange happen: finding a counterparty, agreeing on terms, and ensuring that the agreement is kept. Property rights are the socially recognized entitlements to use resources and to exclude others from using them.

The two concepts anchor the new institutional economics. If transacting were costless, bargaining would resolve every conflict over resource use and the organization of economic activity would not matter. Because transacting is never costless, the rules that define, measure, and enforce rights become a central determinant of economic performance – an insight that recent arguments extend to blockchains.

The economics of transaction costs

Dahlman's taxonomy

Building on Ronald Coase's treatment of social cost, Carl Dahlman argued that externalities persist only because transacting is costly: if exchange were costless, potential Pareto improvements would be realized by bargaining among self-interested agents – in the theory of externalities, "transaction costs are the root of all evil." His article supplies the canonical trichotomy, organized by phase of exchange:

Dahlman then argued that the three classes reduce to one – resource losses due to imperfect information – since each exists only because agents lack knowledge of trading opportunities, of counterparties' willingness to trade, or of whether performance will occur. On this view transaction costs are analytically like transport costs: if bargaining an externality away costs more than it gains, the observed outcome is already a constrained optimum, and market failure cannot be demonstrated by conceptual analysis alone.

North: institutions and economic performance

Douglass North defined institutions as "the rules of the game" – humanly devised constraints that structure incentives in political, social, and economic exchange; together with the technology employed, they determine the costs of transacting and producing, and hence economic performance. North cited measurements putting the transaction sector of the American economy at 45 percent of GNP in 1970. Four variables govern the cost of transacting: the cost of measuring the valuable attributes of goods and of agent performance; the size of the market, meaning personal versus impersonal exchange; enforcement, where the difficulty of creating a relatively impartial judicial system has been a critical stumbling block in economic development; and ideology, which matters precisely because measurement and enforcement are costly. North also distinguished institutions (rules) from organizations (players), which invest in whatever skills the institutional incentive matrix rewards – if the highest payoffs are to piracy, organizations become better pirates.

Williamson: governance of contractual relations

Oliver Williamson described the new institutional economics as "preoccupied with the origins, incidence, and ramifications of transaction costs": were those costs negligible, the organization of economic activity would be irrelevant, since any advantage of one mode would be eliminated by costless contracting. He characterized transactions along three dimensions – uncertainty, frequency, and the degree of durable transaction-specific investment – with opportunism, "self-interest seeking with guile," central to the problem. A governance structure is the institutional framework within which the integrity of a transaction is decided, and structures should be matched to transactions in a discriminating way: market governance for non-specific transactions, trilateral governance with third-party arbitration for occasional idiosyncratic ones, and bilateral relational contracting or unified governance (vertical integration) for recurring idiosyncratic ones.

The property-rights paradigm

Armen Alchian and Harold Demsetz recast ownership itself: what is owned are not resources but socially recognized rights to use resources – a partitionable, always circumscribed bundle, with the strength of ownership given by the probability that the owner's decision about a use actually determines that use. Communal rights that lack the power to exclude invite free riding and overuse – depleted game stocks, polluted waterways, congested freeways – because users ignore the full costs of their actions.

When transacting is costless, the identity of private owners does not alter how resources are used; with positive transaction costs, reassigning ownership has allocative effects, and the most important consequence of institutional rearrangements such as the enclosure movement may have been their impact on the cost of transacting itself. Rights structures also evolve endogenously: when technology or demand makes a communally held resource more valuable, societies tend to convert it toward exclusive, transferable private rights. The view of ownership as an adjustable bundle underpins later allocation mechanisms such as Harberger taxes.

Refinements: bargaining power and information gathering

The formal property-rights (incomplete-contracting) approach of Grossman, Hart, and Moore has been refined in ways that reconnect it to transaction costs. Patrick Schmitz showed that replacing the standard 50:50 division of surplus with generalized Nash bargaining leaves the suboptimality of joint ownership intact for any distribution of ex-post bargaining power, but overturns another staple result: it can be optimal to assign ownership to the party whose investment is less productive when that party's bargaining power is relatively small, so a strong bargaining position can compensate for weak bargaining power. Schmitz also allowed a party to invest in gathering private information about its default options before deciding whether to collaborate; negotiations under the resulting information asymmetry produce inefficient rent seeking – a genuine transaction cost arising inside the property-rights framework – which can make it optimal for the non-investing party to own the asset.

The costs a blockchain lowers

Christian Catalini and Joshua Gans name the two costs a blockchain changes in Some Simple Economics of the Blockchain (NBER working paper, 2016, revised 2019; published in Communications of the ACM in 2020). The first is the cost of verification: checking the attributes of a transaction, such as whether it took place and who now owns a native digital asset, without paying an intermediary to audit it. The second is the cost of networking: starting and running a marketplace without handing control to a platform operator, by paying tokens to whoever supplies the resources that operate and secure the network.

They expect this to change intermediation rather than end it, by reducing the market power of intermediaries. Cheap verification also lets property rights be defined at a finer grain, since any digital asset, or a small fraction of one, can be tracked and traded on a shared ledger. Its limit is what they call the last mile: when a ledger entry stands for something offline, such as a person's identity, linking the entry to the world costs as much as it would without a blockchain.

Sinclair Davidson, Primavera De Filippi and Jason Potts put the question in Williamson's terms in Economics of Blockchain (2016). Transaction-cost economics asks why some transactions take place inside firms rather than in markets; they ask why some might take place on blockchains rather than in either. Hierarchies and relational contracts exist largely to control opportunism, and a blockchain controls it another way, through public transparency and contracts that execute automatically. The catch is that a blockchain handles only complete contracts, while firms are built largely from incomplete ones. They conclude that a blockchain is better understood as an institutional technology than as an information technology: one that competes with firms and markets as a way of coordinating economic activity, and is more or less efficient than they are depending on conditions.

Blockchains and the crypto-Coase argument

Prateek Goorha analyses blockchains through mechanism design: an effectively instantiated blockchain defines, largely inviolably, an allowable action space for participants and a mapping from actions to outcomes – a class of implementable mechanisms. He cautions against the "super-ledger" reading: blockchains do not inherently make truth more likely, they are not universally public, and they are not synonymous with immutability, which depends on the verification protocol. Instead, they constitute an incipient third form of economic organization between markets and planning – a "cryptographic stigmergy" in which self-organization replaces some of the need for top-down planning and for discovering market prices.

His crypto-Coase theorem states that in an environment of high frictional costs imposed by market orderings on one side and by planning on the other, economic activity moves toward this third form, where contextual information and identity are most closely matched in a verifiable manner. Identity, comprising a right to use and a right to exclude, is "possibly the quintessential property right," and the right to exclude is a key strength of the blockchain. He adds a practical caveat: with pervasive transaction costs, the initial distribution of assets will almost always matter.

See also: microfinance and micropayments, where the transaction-cost floor is the binding constraint — a payment too small to justify its own settlement and verification cost simply does not happen, whatever the parties would prefer.

Smart contracts and incomplete contracts

Nick Szabo, who coined the term smart contract in the 1990s, draws the line between what code can and cannot settle in Wet code and dry (2006). Wet code is interpreted by people: law is read by those it binds, by those who enforce it and most authoritatively by judges, and their readings differ. Dry code is interpreted by computers. Traditional contracts are wet code and smart contracts mostly dry, though even a smart contract has wet parts, such as the dialogs through which a user learns what it does and sets its parameters. The two kinds have very different semantics, and Szabo argues that real problems need them to interact; dry code takes over work from wet code only slowly, one narrow task at a time.

Incomplete-contract theory, the Grossman–Hart–Moore approach described above, explains why the wet part persists. Cathy Barrera, an economist at the consultancy Prysm Group, applies it to blockchains in Incomplete Contracts and Blockchain (2018). A contract can be enforced only on events a third party can verify, and nobody can foresee and write down every contingency, so every contract is incomplete. Executing already-verifiable terms automatically therefore adds least, since existing institutions handle those terms well; the larger gain lies in making more information verifiable, so that more terms can be written into contracts at all. Her example is car insurance priced on a device that records how a person drives. The same argument explains why a token backed by a real asset still needs someone to hold control over the asset, which is covered under blockchain and capital markets.

Relevance to Caper

Transaction-cost economics explains where DAOs fit: a DAO is, in Williamson's sense, a governance structure, viable wherever on-chain coordination beats firm hierarchies and spot markets on the costs of transacting. On Caper, fundraising through perpetual bonding-curve markets substitutes posted algorithmic prices for bilaterally negotiated terms, compressing search and bargaining costs, while token-holder governance relocates the enforcement problem rather than abolishing it. Voting is legislative only: after the voting window a permissionless crank folds the ballots into a frozen supermajority verdict, and a passed tally does not itself reach the treasury. Where the winning option is executive, the tally arms a trigger that locks the trailing average price as a baseline and opens the optimistic window; the proposal is ratified only if the price integrated over that window sits at or above the baseline, and execution refuses to bind an action to a proposal that has not settled as passed.

Where the winning option is a DEBATE position, there is no action to arm: the proposal is terminal at the tally, and the market half has nothing to arbitrate because nothing was decided that anyone must carry out. For the proposals that do act, there are two enforcement channels, not one: the computational half removes the risk that an approved decision is never carried out, and the market half restores a check against decisions that are carried out and are wrong.

In Williamson's terms that is closer to trilateral governance than to unified – the market stands in for the third party, and its arbitration is priced, because overturning a window's verdict costs a price displacement held for a real share of the window rather than one block's capital. The underlying Radix platform pushes in the same direction by treating tokens and permissions as platform-native primitives and making transactions human-readable before signing, reducing the measurement and verification costs that North placed at the heart of exchange.

References

1. Carl J. Dahlman (1979). The Problem of Externality. Journal of Law and Economics, Vol. 22, No. 1, pp. 141–162.
2. Douglass C. North (1992). Transaction Costs, Institutions, and Economic Performance. ICEG Occasional Papers No. 30, ICS Press.
3. Oliver E. Williamson (1979). Transaction-Cost Economics: The Governance of Contractual Relations. Journal of Law and Economics, Vol. 22, No. 2, pp. 233–261.
4. Armen A. Alchian and Harold Demsetz (1973). The Property Right Paradigm. The Journal of Economic History, Vol. 33, No. 1, pp. 16–27.
5. Patrick W. Schmitz (2013). Bargaining position, bargaining power, and the property rights approach. Economics Letters, Vol. 119, No. 1, pp. 28–31.
6. Patrick W. Schmitz (2006). Information Gathering, Transaction Costs, and the Property Rights Approach. American Economic Review, Vol. 96, No. 1, pp. 422–434.
7. Prateek Goorha (2018). Blockchains as Implementable Mechanisms: Crypto-Ricardian Rent and a Crypto-Coase Theorem. The Journal of the British Blockchain Association, Vol. 1, Issue 2.
8. Christian Catalini and Joshua S. Gans (2016). Some Simple Economics of the Blockchain. NBER Working Paper No. 22952, revised June 2019; published in Communications of the ACM, Vol. 63, No. 7 (2020), pp. 80–90.
9. Sinclair Davidson, Primavera De Filippi and Jason Potts (2016). Economics of Blockchain. Paper presented at the Public Choice Conference, Fort Lauderdale, May 2016; SSRN Working Paper No. 2744751.
10. Nick Szabo (2006). Wet code and dry. Unenumerated (blog), November 2006.
11. Cathy Barrera (2018). Incomplete Contracts and Blockchain. Prysm Group, 4 April 2018.