Fiscal Realism: Taxes, Budgets and the Limits of Growth#
SLOP2418 — Urban Design Studio
Week 8 · Tobias Wren · 26 April 2027
direct readout · derived measure · worked hypothetical
You are ₡9,000 a month short#
A separate worked hypothetical: close a ₡9,000/month deficit using different combinations of services and taxes. The following comparisons teach opportunity cost; they are not the Week 8 submission target.
Monday’s studio instead cuts 22% of eligible allocated outlay, protecting both utility increments. Use the resource worksheet’s explicit denominator.
Where the money comes from#
| Revenue line | Share of monthly income | What moves it | Delay before it moves |
|---|---|---|---|
| Residential tax | ~46% | rate, population, land value, education mix | 2–4 weeks |
| Commercial tax | ~24% | rate, footfall, land value at the frontage | 1–2 weeks |
| Industrial and office tax | ~19% | rate, resource-chain throughput, office demand | 4–8 weeks |
| Service fees and fares | ~11% | ridership, utility consumption, fee settings | immediate |
Worked hypothetical: shares are typical for a Kerrow-corridor save at this week; read your own fiscal panel for your figures.
George, in one paragraph#
- A parcel’s value is almost entirely a function of what surrounds it: the road, the transit stop, the school catchment, the square at the end of the street.
- None of those were built by the parcel’s owner. All of them were built by the studio, out of the operating budget.
- George’s conclusion is that the resulting value is the community’s, and is the proper base for public revenue.
- The studio’s narrower conclusion: the land value info-view is a map of your own past spending, and it is the only readout that tells you which of your investments worked.
Who made the value#
Collective investment changes the location; the uplift does not explain who receives it.
George on the land tax#
The tax upon land values is, therefore, the most just and equal of all taxes.
— Henry George, Progress and Poverty, 1879, Book VIII
The optimistic bound#
Stiglitz (1977), with Arnott (1979): under a set of idealising conditions, the aggregate rise in land rent produced by a public good is exactly enough to pay for that public good.
The conditions the corridor does not meet:
- It assumes population is free to move in response. Yours is, partly.
- It assumes the public good is optimally sized. The Halstead Reach civic plaza is not.
- It assumes the rent is fully captured. You capture a percentage of it, set by a slider, and that percentage also drives people away.
The two levers#
| Lever | Tax rate | Budget slider |
|---|---|---|
| What it changes | how much of existing activity you take | how much service you supply |
| Who notices | prospective residents and businesses | existing residents and businesses |
| Speed | 2–4 weeks, through demand | immediate, through coverage and capacity |
| Failure mode | the district stops growing | the district stops working |
| Reversible? | yes, and cheaply | yes, but the abandonment is not |
Your tax rate is an admissions policy#
Tiebout (1956): households choose the jurisdiction whose bundle of taxes and services suits them. In the corridor that shows up as demand by education level.
| Residential rate | Low-education demand | High-education demand | Net monthly change |
|---|---|---|---|
| 9% (current) | steady | steady | — |
| 11% | steady | −8% | +₡5,400 |
| 13% | −3% | −21% | +₡8,100 |
| 15% | −14% | −38% | +₡6,900 |
Worked hypothetical: illustrates the mechanism, not a measured result from any specific save.
A budget slider is not a discount#
What actually happens at 70% funding on a school:
- Its coverage radius contracts before its student capacity does.
- The blocks that fall outside the new radius do not lose a little education. They lose all of it.
- The uneducated cohort begins to grow about six weeks later, and it is the input to office demand about twelve weeks after that.
- The saving is 30%. The service is not 70% of a service.
The funding-response curve#
Cutting below default reveals losses quickly; spending above it buys diminishing returns.
Five ways to find ₡9,000#
| Move | Monthly effect | First visible consequence | Metric it lands on |
|---|---|---|---|
| Transit operating budget 100% → 75% | +₡4,100 | frequency drops; corridor bus load factor over 1.0; car mode share up | mobility performance |
| Education 100% → 70% | +₡3,600 | Ockley Green primary’s radius retreats off Farrant Row | livability now, fiscal in eight weeks |
| Healthcare 100% → 80% | +₡2,200 | clinic coverage leaves Farrant Row entirely | livability |
| Residential tax 9% → 11% | +₡5,400 | high-education demand falls 8%; land value flattens | fiscal now, livability later |
| Defer the water-production increment | +₡6,800 | Capacity risk persists | Rejected: protected in the studio allocation |
Worked hypothetical: five illustrative moves, not a ranked or exhaustive menu against any one save.
Two closures, sixteen weeks out#
Both close ₡9,000. Neither is wrong.
| Outcome | A — transit and healthcare | B — education and tax |
|---|---|---|
| Composition | transit 75% (₡4,100), healthcare 80% (₡2,200), tax 9% → 10% (₡2,700) | education 70% (₡3,600), tax 9% → 11% (₡5,400) |
| Week 4 | bus load factor 1.14; clinic off Farrant Row | primary radius off Farrant Row; demand softening |
| Week 8 | car mode share +9 points; corridor arterial at capacity in the peak | uneducated cohort +6%; well-being −4 in two districts |
| Week 16 | road upkeep +₡1,900 / mo; deficit partly reopened | office demand −11%; commercial tax line falling |
| Metric taken | mobility performance | livability, then fiscal performance |
Worked hypothetical: a sixteen-week projection from this week’s closure choice, not a recorded outcome.
The upkeep you already signed for#
Shoup’s argument, applied to the road rather than the kerb: a public good supplied without a price is a subsidy, and the subsidy appears somewhere else on the budget.
- The Kerrow corridor arterial cost ₡41,000 to build, once, in Week 5.
- It has cost ₡1,240 a month ever since, and the widening in Week 6 took that to ₡1,610.
- Across twelve weeks of studio the upkeep will exceed a third of the build cost, and nothing about the road will have improved.
- There is no slider that switches a road off. It is the only line on the budget with no dial next to it.
Worked hypothetical: the corridor’s own Week 5/6 build costs, typical of studio saves; substitute your own upkeep readout.
Fiscal performance is fixed. Pick the other one.#
The ₡9,000 closes either way. What differs is which metric pays for it:
- Mobility performance — cut the transit operating budget, hold the services, and watch car mode share do the rest.
- Livability — cut education and healthcare coverage, hold the buses, and watch well-being fall in the districts the coverage leaves.
A budget is not a limit on the design. It is the part of the design where you have to say which metric you are willing to be worse at.
This week#
The studio removes 22% of eligible worksheet outlay, protecting both utility increments. The ₡9,000 examples above are separate worked hypotheticals, not a deficit applied to your save.
- Studio session, Monday: compose the 22% cut in the room. Arrive with the fiscal readout and the land value info-view already open.
- Write down your closure and its cost in one metric before you touch a slider. If those two lines contradict what the readout does by Week 4 of the run, that contradiction goes in the memo.
- Assessment 2, due next week — Public Realm & Infrastructure Plan, 25%. Fiscal 30, livability 45, mobility 25.
- Next week is the public realm, which is the cheapest livability on the budget and the reason the fiscal 30 and the livability 45 are on the same brief.