An economic model becomes useful when it names who pays, who benefits, who can refuse, who absorbs failure, which fee buys which service, and what remains an externality rather than a solved problem.
Learning boundary. This lesson is an educational model, not financial, investment, legal, tax, pricing, or business advice. A fee schedule or incentive design does not establish profitability, fair value, adoption, compliance, safety, or acceptable risk for a particular organization.
Learning objective
Turn a transaction diagram into an accountability map.
By the end of this lesson, you should be able to identify payer, beneficiary, operator, counterparty, intermediary, fee recipient, dispute owner, and risk bearer while stating which economic effects require real measurement rather than intuition.
01 · Actors
Who participates?
Name principal, agent, seller, buyer, provider, platform, intermediary, custodian, and resolver. Do not hide multiple obligations behind “the system.”
02 · Fee
What is purchased?
Describe the service a fee pays for: access, routing, execution, custody, verification, conversion, support, or dispute handling.
03 · Risk
Who absorbs failure?
Map fraud, non-delivery, volatility, downtime, data exposure, reversal, dispute, and counterparty risks to the actor with the remedy and evidence.
04 · Externality
What is not priced?
List congestion, exclusion, surveillance, lock-in, model error, energy, labor, and other effects as questions to measure—not as assumed costs or benefits.
Practice lab
Redraw the “free” workflow.
A platform lets agents discover providers at no upfront charge. It earns a routing fee from completed orders; providers pay dispute costs, while buyers bear delays and agents may send repeated requests during retries.
List the actors, their payment or non-payment, and the service each receives.
Map the fee recipient and the risk bearer for duplicate work, delay, non-delivery, and dispute.
Identify the incentives that might cause an agent, platform, or provider to behave differently.
Name the measurements needed before making any claim about efficiency, profitability, fairness, or adoption.
Source shelf
Study institutions, risk, and structured value transfer.
BIS: The next-generation monetary and financial systemUse the institutional treatment of monetary and financial system components to ask where instruments, ledgers, settlement, and intermediaries fit in an economic model.
ISO 20022 message definitionsStudy how structured messages can carry payment-event data across actors without implying that the message resolves the underlying allocation or dispute.
NIST AI Risk Management FrameworkUse the risk-management vocabulary to name context, affected actors, measurement, governance, and unresolved impacts. It is not a commercial viability test.