TYI Economics

[ Economic Intelligence for the Policy Arena ]

Economic analysis that lands in government

TYI Economics is the economics practice within TYI Strategy, a pro-growth political consultancy with deep cross-party engagement across Whitehall, Westminster and beyond.

Our work is produced by economists who have undertaken cost-benefit appraisal inside the Cabinet Office and the Department for Business and Trade, alongside policy professionals with direct experience of how policy proposals are framed, briefed, and contested in Westminster.

We exist for cases where knowing the language and machinery of Whitehall is key to winning the attention of ministers and officials.

Read our brochure

Covers who we are and what we do, with the Loan-to-Own case study in full.

Policy-Literate

Our work is built from the start to be read and used by Whitehall officials, Select Committee staff, and Special Advisers. The economic argument and the policy argument are constructed together in the language understood within the Westminster ecosystem.

Principal-Delivered

Every client works directly with the TYI Chief Economist and Director of Policy & Research from scoping to delivery. The diagnostic, the modelling, the drafting, the engagement: all done by the principals you meet at the start.

Green Book Rigour

We work to the standards of the HM Treasury Green Book. Our research and policy notes are designed to drive decisions, not academic citation. Applied work, written for the people whose decisions it will inform.

[ What we do ]

Three areas of work, one analytical engine

Economic modelling is the core. Strategic policy analysis takes that modelling into government; commissioned research takes it into the public debate. Trade associations, listed corporates, and sector bodies commission these individually or together when they need analytical work that will land credibly in Whitehall.

Economic Modelling

Bespoke quantitative models, rigorous and reproducible

We build models that fit the question at hand, with reproducible work designed to be trusted by policy makers, civil service officials, and journalists.

Scenario and sensitivity analysis for policy proposals
Sectoral economic impact modelling, including real GDP, employment, and tax revenue
Transaction-volume and demand-side modelling for housing and other illiquid assets
Net Present Value analysis for long-term opportunities and challenges such as new technology

Strategic Policy Analysis

Our modelling, packaged for Whitehall engagement

We translate our modelling into the standard formats of government engagement, calibrated to the standards of ministers, civil service officials, and Select Committee members.

Private roundtables and policy memos
Parliamentary briefings and Select Committee evidence
Consultation responses and submissions for departmental engagement

Commissioned Research

Our modelling, packaged for publication and public debate

For clients whose case has to be won in public as well as in private, TYI Economics undertakes commissioned research to support wider engagement on specific issues. Written to be cited, debated, and acted on rather than filed.

Original research papers and policy notes, with public launch events
Op-eds and short-form economic commentary for publication
Sector intelligence reports and evidence packs
Briefing materials for media engagement and advocacy

[ Case Study ]

The Loan-to-Own Scheme

A developer-funded, government-backed equity loan scheme for first-time buyers, developed with Weston Homes and launched in Parliament in March 2026. The launch resulted in meetings with No. 10 and HM Treasury.

Revenue-positive for the Treasury, fiscally neutral on the balance sheet, and structured to avoid the perverse incentives of Help to Buy. Modelled across a full scenario matrix anchored to OBR and Bank of England data.

“TYI provided the rigorous, Treasury-grade modelling and strategic insight needed to turn the LTO scheme into a highly credible proposal with serious cross-party traction.”

Suzanne Aplin, Group Sales and Marketing Director, Weston Homes

£500

Monthly saving vs 95% LTV mortgage

14,003

Additional FTB completions per year

£28m

Annual net revenue to Treasury

Further expertise across quantum technologies (£1.3tn of cumulative UK benefit modelled to 2045), building safety (Safe and Abundant, with forewords from MPs of all four major parties), and the rural economy and planning.

[ Meet the Economists ]

Government experience, plus the publishing reach to put it to work

Jethro Elsden

Chief Economist

Jethro has an extensive background in economic analysis, policy and research. Most recently he spent four years in the civil service working on regulation analysis and policy in the Cabinet Office and DBT – giving him an extensive understanding of the internal policymaking process in government. Prior to that he worked at Centre for Policy Studies think tank, with previous work there featured in media outlets such as The Times, The Telegraph and the Spectator.

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Maxwell Marlow

Director of Policy and Research

Maxwell has a distinguished professional background in policy and research, with numerous pieces of his work featured in leading media outlets such as the Financial Times, the Times, the Telegraph and the Guardian. Maxwell’s research and policy work for The YIMBY Initiative has already been considered at the highest levels of government, opposition parties and business. He is responsible for TYI Research and TYI Strategy.