The AI Capex Ledger
GeometricInvestor · Substack
The clearest version of AI as a chain of required returns — the frame the whole Money part runs on.
Who gains from AI, who pays for it, and what India should do about the difference.
This page grew out of two talks delivered at the Takshashila Institution in June 2026. Both talks are preserved below exactly as delivered; this guide is the version that will keep growing over time. Feedback is always welcome, please feel free to leave a comment below.
This is the map. The ten ideas above are the argument; these six are the doors into it. Each part is being written up from the talks; until it moves in, its links take you to exactly where it lives in the talk — and Part 1's exhibit is already embedded below.
A general purpose technology is actually the easy bit. Rearranging our civilization around it is the hard part. To better understand AI, you have to understand other general purpose technologies from the past: electricity and the internet are great examples. What those GPTs did to work, and the bargaining around work helps us understand what is likely to happen this time around... but with one crucial difference. This GPT's capability frontier moves very, very quickly.
Capex is expensive in AI. But the good news is that inference is becoming cheaper by the day. The real thing to keep track of when people talk about the AI stack is whether each stack's revenue generates enough for the whole thing to keep humming. And the thing that really decides this is... depreciation.
AI changes tasks before it changes jobs, and contracts before it changes statistics. The evidence so far: broad usage, concentrated stress at the entry rung, and firms changing shape.
How will India be affected? Depends on which India you are talking about. The bad news is that India is exposed most right where it shines: IT and ITeS. The good news, on the other hand, is that India also has real options. But as always, there's an asterisk, and that's where the reading matters.
Measure the shock before it is obvious, make good experiments cheaper, keep frontier access open, and treat the safety net as a state-capacity problem. Easier said than done? You bet!
There's economics, which is confusing but exciting. Then there is accounting, which is boring, but clarifying. The bad news is that you have to keep both stories on track in your head.
Parts appear here as they are written; the talks below remain the complete argument in the meantime. The library and the open questions are already live.
The two seminars this guide grew out of, preserved exactly as presented — dual-mode pages that read as essays and present as slides.
How value is created, who captures it, and why depreciation suddenly matters. Three acts: the economics lens, the accounting lens, and how to read today's headlines through both.
Open the talk → 27 June 2026A socio-economic map of diffusion, disruption, and optionality. Five moves: GPT history, the task lens, the 2026 evidence, India, and the choices.
Open the talk →Here's a curated, reasonably-frequently-updated (no promises!) reading list, related to this topic. Have I read every word in each of these? Hell no. Should you? Also hell no. Exercise judgment, and happily have your LLM of choice read the longer ones. But curate your reading, and never ask the LLM to choose for you — that'd be my way of going about it.
GeometricInvestor · Substack
The clearest version of AI as a chain of required returns — the frame the whole Money part runs on.
David Cahn · Sequoia Capital
The canonical revenue-gap challenge: where is the revenue that justifies the capex?
Daniel Nishball · SemiAnalysis
The empirical engine room: value migrating from the infra layer to the model labs, who now charge by the economic value of the token. Maps directly onto the four-layer ledger. Paywalled past the midpoint.
Du · arXiv 2603.28576
A data-backed look at the token price collapse — the cheapening-to-use half of the central tension.
Cottier et al. · arXiv 2405.21015
Why frontier training remains capital intensive — the expensive-to-build half of the central tension.
International Energy Agency · IEA report
The best starting point on power, data centres, and grid timing.
Goldman Sachs Research · Goldman Sachs
The optimistic macro case; pair with Acemoglu's task-based caution and let the reader hold both.
Daron Acemoglu · NBER w32487
The cautious task-based macro case — the disciplined counterweight to the 7% headline.
Alex Tabarrok · Marginal Revolution
The counterweight that keeps the guide honest: a falling labour share is not a transfer from labour to capital, and real compensation is at an all-time high. The worry is the future Jevons world, not the present tense.
Bai et al. · arXiv 2604.22750
Why agentic workflows change token economics: unit prices fall, total bills rise.
Google Cloud · Google blog
A concrete catalogue of enterprise adoption — useful ballast against both hype and doom.
Pranay Kotasthane · Takshashila Institution
The missing India vantage on compute: a consumer-integrator with supply access but little capability ownership. The best person I know working on AI and semiconductors in India.
Bresnahan & Trajtenberg · Journal of Econometrics, 1995
The core frame: a GPT changes society by changing the production map, through complements and reorganization.
Acemoglu & Restrepo · JEP 33(2), 2019
The vocabulary the whole Work part runs on: displacement vs reinstatement vs productivity, and so-so technologies that displace without big gains.
Arnold Kling · Substack
Patterns of sustainable specialization and trade: adjustment is a search process, so optimism should come from search capacity, not inevitability.
Handa et al. · arXiv 2503.04761
Task-level evidence from millions of Claude conversations — the augmentation/automation split is the number to watch.
OpenAI economic research · OpenAI
Scale and activity mix of consumer AI use — the diffusion baseline.
OpenAI · openai.com
Economically valuable tasks as a benchmark target — capability measured in work products, not quiz answers.
METR · metr.org
The task-horizon lens: how long a task can you delegate? The single most useful capability curve for economics.
Brynjolfsson, Chandar & Chen · Stanford Digital Economy Lab
Early-career exposure evidence: a 16% relative employment decline for the 22–25 cohort in exposed occupations. The margin is jobs, not pay.
ILO · ilo.org
Youth employment, skills, informality, and structure — the most-cited India source in the work deck for a reason.
CSEP · csep.org
Current employment structure and labour-market constraints — the base map for the India part.
Autor, Dorn & Hanson · AER 103(6), 2013
How to connect a national shock to local labour markets — the method the India part borrows for AI-exposed cities.
Brian Albrecht · Economic Forces
Diamond–Mirrlees for the AI age: tax output, not intermediate inputs. I agree — and it does not reduce my worries about a post-AGI world. Hold both.
Acemoglu & Johnson · Annual Review of Economics 16, 2024
The canonical this-has-happened-before brick: British real wages roughly halved 1806–1820 and shared prosperity took decades plus political voice. The productivity bandwagon is a choice, not an automatic.
Luis Garicano · Silicon Continent
Travel-agent employment fell over 60% from its peak, yet surviving agents' relative pay rose from 87% to 99% of the private-sector average. The machine took the separable part of the bundle and left people the strong part.
“Labour markets price jobs, not tasks.”
Alex Imas · Ghosts of Electricity (Substack)
The demand-side complement to Garicano: Starbucks automated for years, concluded it was a mistake, and is re-hiring baristas for handwritten notes on cups.
“The relational sector grows precisely because it isn't automated.”
Brian Albrecht · Economic Forces
The optimist's structural-change rebuttal to humans-as-horses — my counter: the induction argument is just saying the sun will rise tomorrow because it always has. One day it won't. A ready-made dialectic.
Dan Shipper · Every
Managers make good workers in an AI-first world: agentic tools amplify returns to judgment and allocation rather than flattening them. Verify the linked PDF before quoting specifics.
Johnston, Holtz, Ong, Tambe, Richmond & Chatterji · OpenAI economic research · arXiv 2606.26959
The freshest as-we-speak evidence of the shift to delegated production: 5× weekly users in H1 2026, ~10× more 8h+ delegations since January. Caveat: OpenAI-internal usage is the frontier, not the average firm.
Philip Trammell · Substack (with Dwarkesh Patel), Dec 2025
The cleanest mechanism for who captures value: while labour is a bottleneck (Baumol) its share can rise; once it isn't (Jevons), the capital share climbs toward one. A post, not a working paper.
“Piketty was wrong about the past. He's probably right about the future.”
Korinek & Stiglitz · NBER w28453, 2021
The most uncomfortable, most India-relevant implication in the literature: when capital substitutes for labour, the engine of catch-up growth shuts off. Say it plainly.
Kim (INSEAD) & Koning (HBS) · HBS WP 26-090 · SSRN, June 2026
Microdata for how firms reorganise: AI-native startups are 25% smaller, 13% more engineers, ~15% fewer entry-level workers and managers — comparable valuations, more value per employee. Cited in both talks; one treatment in the guide.
Tedeschi, Rama & Cruickshank · Stripe Economics, June 2026
The n=1 limit of the AI-native firm and the optimistic flip side of the canary: ~4m Americans earning $100k+ solo. The India question — solo-scaling on DPI rails — should be stated as a question, not a finding.
Alter Magazine · alter (drawing on Bhattacharya, Deaton, Rajagopalan)
Before asking what AI does to Indian jobs, ask whether we can measure Indian jobs. Bonus vignette: when the US blocked computer sales, the ISI built India's first computer in 1953 from war-surplus parts.
“A country that could not buy computing technology built its own from the debris of wars.”
Bharti & Yang · World Inequality Lab, 2025 · SSRN
A century of human-capital divergence: China bottom-up, India top-down. Education inequality is ~25% of wage inequality in India vs under 12% in China — why India did services and China did factories.
Murphy, Shleifer & Vishny · QJE 106(2), 1991
The crisp backbone for engineers-vs-lawyers: talent that organises production innovates; talent that rent-seeks redistributes. Lands hard with an Indian professional audience.
Dan Wang · W.W. Norton, 2025 (book)
The engineering-state vs lawyerly-society thesis, heavily highlighted in my copy. Pair with Hessler's Other Rivers and Ang's How China Escaped the Poverty Trap.
Rodrik & Stiglitz · The New Global Economic Order (Routledge, 2025)
The missing macro spine for the India half: manufacturing became an enclave, services must absorb labour but hit a home-market ceiling — and AI now threatens the services escape hatch too.
The Morning Context · themorningcontext.com
The single most on-thesis India-AI-labour case: ~$50k revenue per employee vs a US benchmark near $300k. India's services-arbitrage model is the thing AI most directly erodes. (Original is paywalled; the headcount economics are corroborated in Lightspeed's open write-up.)
Johanna Deeksha · Scroll.in
Ground-level texture for India climbing the manufacturing ladder: a dormitory-labour regime traced back to 1920s Shanghai cotton mills. The vivid counterweight to abstract labour-share macro.
Nandlal Mishra & Pramit Bhattacharya · Data For India
The rigour footnote for any manufacturing-employment claim: household surveys say 68.5M by 2022–23, enterprise surveys a static ~48M. Keep every claim defensible.
Praveen Chakravarty · The New Indian Express
Telangana's Composite Backwardness Index across 242 caste groups: the strongest predictor of backwardness is access to English-medium education, not land. The bridge from caste to who reaches the AI economy.
Mishra · arXiv 2606.13314
AI exposure mapped onto caste — the working paper behind the inequality-layers section.
Jesús Fernández-Villaverde · X thread (with John Burn-Murdoch)
TFR already 1.88, projected to US levels by ~2031, Kerala 1.3 vs Bihar 2.9. The dividend window is closing faster and unevenly. Not a crisis yet, but it is coming.
Cox & East · NBER w35129
First causal national estimate: no positive spillover to US-born workers from immigration enforcement. The India parallel is sons-of-the-soil politics meeting internal migration.
Korinek & Lockwood · NBER w34873, 2026
The careful framework behind the token-tax section: stock vs flow, and Diamond–Mirrlees as the spine — tax output, not the intermediate input.
“You don't make people richer by making steel expensive.”
Anthropic Economic Futures · Anthropic
The policy-menu source: token taxes, sovereign wealth funds, automation adjustment assistance, the physical-vs-human-capital tax bias. My caveat: the scenario buckets are not well defined.
Economic Survey 2016-17, Ch 9 · Government of India
The UBI argument is really a state-capacity argument: a reliable cash floor plus portable benefits plus active placement, delivered by a state that can actually do those things.
Shane Greenstein · Digitopoly, June 2026
The Hayekian reading of Amara: the short-run shortfall is mundane friction; the long-run surprise comes from dispersed experiments no planner could design. Exactly the PSST point, made rigorous.
“Anybody who says they predicted this is selling something.”
Noah Smith · Noahpinion
The named optimist to argue with, not a strawman: finite compute means opportunity cost governs deployment. He concedes the three cracks — inequality, adjustment frictions, AI capturing its own means of production.
Noah Smith · Noahpinion
The honest caveat before prescribing India's next bargain: history only happens once, so there is no science of development. Humility on which lever is decisive.
Santosh Desai · Anil Dharker Memorial Lecture
A humanities-register frame for the close: India as a pattern of accommodating contradictions rather than resolving them. Use sparingly; it lands.
“India is about making sure we play the game forever, not about making sure we win it.”
WSJ · Wall Street Journal
Depreciation schedules are where the AI boom's profitability actually gets decided — the quiet hinge of the Money part.
Azeem Azhar · Exponential View
Above water, not ashore: trailing revenue ~$110bn, ~19% depreciation headroom on stated assumptions. The best single synthesis to date-stamp and revisit.
Ethan Mollick · X (on the BBC 'Industrial Revelations' series)
Mollick's one-line version of this guide's opening claim: steam changed nothing until thousands of skilled workers worked out how to apply it to their existing jobs. Swap steam for AI and that is the adaptation problem exactly — the technology is the easy part; the reorganization is the long grind. He points to the BBC 'Industrial Revelations' series as the illustration.
“Steam alone wasn't enough, it required thousands of skilled workers figuring out how to apply this new power to their old work.”
Nothing matches — clear the search or pick another part.
A field guide that only asserts is not worth rereading. These are the questions the talks ended on — verbatim — and the ones this guide is still working on. The question is not "Will AI help India?" The question is: which Indians, which cities, which firms, and which ladders?
If AI is better at many tasks, what should humans become relatively best at?
from The Economics of AIIf AI can do 40% of your tasks, which 60% becomes more valuable, and which 20% should never have been in your job?
from AI, Work, and IndiaIf a hospital, bank, or startup can be unplugged from a frontier model overnight, what is that model worth on its balance sheet?
from The Economics of AIIf only approved institutions can touch frontier capability, who gets to decide what AI is for in Indian conditions?
from AI, Work, and IndiaDesign education around projects where students must use AI, explain what they trusted, show what they rejected, and defend the final judgment. What would that look like in an Indian classroom?
from AI, Work, and IndiaWhen you hear an AI headline, which ledger changed — and what evidence would prove it?
the question to leave withFor ten years I wrote blogposts about economics. This is what I now believe replaces most of them: one growing, navigable document instead of a scattered archive — with the talks that seeded it preserved exactly as delivered, and every claim carrying its source.
The guide grows the way my reading works: I clip an article, argue with it properly, and then it earns a place here — as a library entry, as evidence inside a section, or occasionally as a new section. Updates follow my reading rhythm, not a publishing calendar; the changelog above is the honest record of both.
The register throughout: steel-man the optimists, keep the sharpest dissent, and hold two true things at once. Where the evidence is genuinely unsettled, the guide says so instead of picking a team.
Written by Ashish Kulkarni, built with Claude. Sources marked ✓ were checked against primary documents during talk preparation (June 2026). Single self-contained page; the only external call is to Google Fonts.
A living document should show its work. Every meaningful addition lands here first, and the best of them become posts on the blog.
Feedback, corrections, and pointers to what I've missed all make this guide better. A threaded comment section is on the way; until it lands, the fastest line is email — ashish@econforeverybody.com.