Haute Lumière
Commerce · III.04 · MMXXVI · daylight
ASSESSMENT · Chapter III.04 — Credit as a Commons
Three instruments: a ten-point quiz, eight reflection questions, five essay prompts. The quiz checks comprehension rather than recall. The reflections are private and first-person. The essays are arguable from more than one side.
THE QUIZ — ten points
Four on recall.
1. Define netting efficiency, and say what it is a property of.
netting efficiency = 1 − (cash required to settle / gross obligations). It is a property of how densely the obligation graph loops — who trades with whom — and not of the clearing software. One mark for the expression, one for naming the population as the thing that decides it. The strongest answers note that a promoter quoting an efficiency without a population has told you nothing.
2. Name Ostrom's eight design principles as they apply to credit, and the ninth term the chapter says a credit commons additionally needs.
Clearly defined boundaries; congruence with local conditions; collective-choice arrangements; monitoring accountable to members; graduated sanctions; cheap local conflict resolution; recognition of the right to organise; nested enterprises. The ninth term is the capital rule — the levy, its percentage, and the reserve ratio it targets — because a pasture cannot be levered and a credit commons can.
3. What did Giné and Karlan find when group liability was removed from existing Philippine lending groups, and what did Feigenberg, Field and Pande find was doing the work instead?
No increase in default over three years, and larger groups. In expansion areas, group liability produced no default advantage and fewer new groups formed. Feigenberg, Field and Pande found meeting frequency mattered: clients assigned to weekly rather than monthly meetings were about 3.0 times less likely to default on the following loan. The mechanism was repetition, not threat.
4. State the clearing coverage ratio and say what happens above roughly three months.
clearing coverage ratio = debit balance / monthly in-network receipts, in months. Above roughly 3.0 months the balance has stopped being trade credit the circle can work off through trade and has become a loan — and a clearing circle has no machinery to call a loan.
Four on application.
5. A mutual credit scheme advertises "92 percent netting efficiency, demonstrated." What do you ask for, and why?
The population and the obligation graph it was measured on. A demonstration circle constructed to contain loops reaches 91.30 percent; Slovenia's national monthly set-off clears 10.0 to 15.0 percent on a real economy; CLS reaches 96.0 percent because every member deals in the same instruments. Full marks require naming the spread — 86.0 points between a national set-off and CLS on identical arithmetic — and concluding that the figure without the population is not a claim about the software.
6. A circle's founders propose waiving the reserve levy for the first two years to attract members. Diagnose it.
They have proposed running a lending book with a capital ratio of zero. A 2.0 percent default year on €640,000 of debits costs €12,800, and with no reserve that falls as a 2.00 percent haircut on every positive balance — precisely the members they recruited. A 1.0 percent levy on €4,400,000 of turnover raises €44,000 a year and reaches the Basel leverage floor equivalent in 0.44 years. The stronger answer says the waiver does not remove the cost; it moves it from a fund onto the members who were told the circle was safe.
7. A supplier says: "Trade credit isn't really credit — no bank is involved." What is missing?
Trade payables are credit extended sideways, and in most economies the total firms owe one another exceeds the bank credit outstanding to the same firms. Nobody underwrote it and nobody priced it, which makes it a commons rather than a market — and commons have carrying capacities. Credit any answer that identifies the carrying capacity as set by in-network trade rather than by goodwill.
8. A credit union markets itself as "always safer than a bank." Correct it using the loss record.
In 2024 credit unions charged off 0.80 percent against banks' 0.68 percent — the cooperative form lost more. At the crisis peaks it was 1.21 percent against 2.67 percent — the cooperative form lost far less. The honest claim is steadier, not safer: the advantage is a tail property, and the discount is an insurance premium paid in the calm years. The strongest answers give the breakeven crisis frequency of 7.59 percent, one year in 13.17.
Two that require the arithmetic to be done.
9. Eight firms hold sixteen obligations totalling €339,000. No pair owes in both directions. Their multilateral net positions are: Tannery −€21,000, Mill +€1,000, Cutter −€1,500, Maker +€28,000, Shipper −€3,500, Dyer +€500, Printer −€3,000, Bookkeeper −€500. Compute the cash required to settle the system, the netting efficiency, and how much trade each euro of settlement clears. Then say what bilateral netting would have saved.
The cash required is the sum of the positive positions: 1,000 + 28,000 + 500 = €29,500. (Check: the negative positions sum to −€29,500, as they must, because every euro owed is owed to somebody.) Netting efficiency =
1 − 29,500 / 339,000= 91.30 percent. Cash released = 339,000 − 29,500 = €309,500. Each euro of settlement clears339,000 / 29,500= 11.49 of trade. Bilateral netting saves nothing at all, because no pair owes in both directions. Full marks require the last line. It is the point of the question: the obvious move is worth zero and the multilateral one is worth 91 percent.
10. A circle clears €4,400,000 of gross obligations a year at 38.0 percent netting efficiency. Members' marginal short-term borrowing rate is 9.0 percent. The circle costs €96,000 a year to run. Does it pay for itself? Then compute the netting efficiency below which it does not — and say what that figure means for a circle proposing to serve a whole regional economy.
Cash released = 4,400,000 × 38.0% = €1,672,000. Interest members no longer owe = 1,672,000 × 9.0% = €150,480. Decision ratio = 150,480 / 96,000 = 1.57× — it clears, with a margin of 13.76 points over breakeven. Breakeven efficiency =
96,000 / (4,400,000 × 9.0%)= 96,000 / 396,000 = 24.24 percent. The second half is the real question. A whole regional economy is a sparse graph: Slovenia's national set-off clears 10.0 to 15.0 percent, which is below this circle's breakeven. A circle that intends to serve everybody must either concentrate on a dense cluster, raise its members' alternative borrowing cost into the calculation honestly, or run far cheaper than €96,000. Credit any answer that reaches "the breadth of the membership and the efficiency pull in opposite directions."
REFLECTION — eight questions, for one person and a pen
These are not for a room. Write the answers by hand if you can; the slowness is the point.
- Who is currently waiting to be paid by you, and who is waiting to be paid by them? Draw it. How far around does it go before it comes back?
- Think of a time you were extended credit — money, time, benefit of the doubt — by someone who had no security at all. What did they know about you that a form could not have recorded?
- Where in your own life is a balance outstanding that you cannot clear through the ordinary course of things? Not the amount — the ratio. How many months of what you actually produce would it take?
- When have you been part of a group where one person's failure became everyone's liability? Write honestly about what that produced: better behaviour, or quieter behaviour.
- What have you insured, or reserved against, that has never been needed — and what does it cost you to keep doing it? Is that a waste or a premium?
- Recall an obligation that was simply cancelled because it looped — you owed them, they owed you, and it went away. What did that feel like, and why is it different from being paid?
- Where are you relying on somebody's judgement in place of a rule, and where are you relying on a rule in place of somebody's judgement? Which one is in the wrong place?
- If your whole network of who-owes-whom were visible to everyone in it, what would you want to settle before the page went up?
ESSAY PROMPTS — five
Each is arguable from more than one side. Each requires at least one source the chapter cites and at least one it does not.
1. The leverage identity. The chapter argues that a mutual credit circle is a bank read backwards at a capital ratio of zero, and that the repair is a levy. Argue either that mutual credit systems should be capitalised and supervised on something like banking principles once they reach a threshold size — and specify the threshold — or that capital requirements would destroy the thing that makes them work. Use Stodder and Lietaer on WIR leverage and velocity, and at least one source on bank capital regulation that the chapter does not cite.
2. Was joint liability ever the mechanism? Guinnane reads German credit cooperatives as information machines whose advantage was knowledge, not liability. Giné and Karlan find group liability bought no repayment advantage and deterred clients. Argue either that joint liability was always a proxy for something else — monitoring, repetition, boundary — or that the Philippine result is specific to a mature lender with an established reputation and does not generalise to a new one. Use Guinnane's Irish transplant paper and one source on microfinance contract design the chapter does not cite.
3. The sparse economy problem. Netting efficiency rises with loop density, so a clearing circle works best on a narrow, dense cluster and worst on a broad, inclusive membership. That is uncomfortable: the population most helped by clearing may be the one least able to generate it. Take a position on whether clearing circles should be built narrow and federated or broad and subsidised, and price your answer using the breakeven figure of 24.24 percent. Use Fleischman, Dini and Littera, and one source on network structure or payment system design that the chapter does not cite.
4. What the steadiness is worth. The cooperative loss profile is a tail advantage bought with a benign-year disadvantage of 0.12 points, breaking even at a crisis frequency of 7.59 percent. Argue either that this makes cooperative banking a rational systemic investment that public policy should actively favour, or that it makes it a product individual members are systematically overpaying for. Use Fonteyne or Ayadi et al., and one source on financial stability or systemic risk pricing the chapter does not cite.
5. The measurement that dignifies and the measurement that indicts. The chapter separates repayment rate, which measures collection, from borrower return, which measures benefit — and notes that de Mel, McKenzie and Woodruff found no positive return in women-owned enterprises while Grameen-style lending overwhelmingly lends to women. Write the case that the microcredit movement should be judged on the evidence of its randomised trials, then write the strongest rebuttal: that the trials measured a narrow outcome over a short horizon and missed what the institutions actually built. Conclude with which you find more persuasive. Use Banerjee, Karlan and Zinman's introduction to the six evaluations, and one source written in defence of microfinance after 2015 that the chapter does not cite.