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Nov 15, 2025 17 tweets 4 min read Read on X
Kalecki–Young Sectoral Inflation Decomposition (KYSID)

"It lets you both model inflation and attribute it sectorally—to wages, productivity, domestic debt saturation, and the external / tradables channel—within a consistent stock–flow, income‑distribution perspective." Image
Kalecki–Young Sectoral Inflation Decomposition (KYSID) Image
Kalecki’s mark‑up pricing and inflation Image
From mark‑ups to the profit share Image
Equation (K3) is the Kalecki distributional inflation equation: inflation depends on wage growth, productivity growth, and changes in the core profit share, scaled by the wage share 1−θ Image
Step 3 – Young’s claim‑dilution ratio

"meaning: excess credit over productive equity tends to raise the core profit share." Image
This is the closed‑economy Kalecki–Young model. Image
Step 4 – Open‑economy extension: adding the tradables channel (KYCD‑T) Image
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Step 5 – Sectoral decomposition: KYSID Image
This is the Kalecki–Young Sectoral Inflation Decomposition (KYSID): an inflation framework grounded in Kalecki’s pricing and distribution, enriched by Young’s balance‑sheet concept of claim dilution and extended to an open economy. Image
Stock–flow perspective on ΔDebt, ΔPE and NX Image
Stylised stock–flow matrix (changes over period t) Image
Why δ is “excess claim creation”

...."is the net increase in nominal claims on future domestic income not matched by new productive backing." Image
is the net increase in nominal claims on future domestic income not matched by new productive backing. Image
Where NX fits Image
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More from @JamesYo43532848

Feb 9
“NK models require fungible capital to avoid balance sheets — "

Non-fungible capital isn’t a hypothesis that needs testing — it’s the real-world condition.
Fungible capital is the modelling assumption, and once you drop it, balance sheets become unavoidable...

.. and the NK equilibrium story disappears.Image
Once capital is non-fungible, such exclusion is no longer valid, and New Keynesian models lose closure without explicit balance-sheet dynamics. Image
When demand shifts or prices change, firms can’t just move their capital to a better use. They’re left with assets that may no longer earn enough revenue — but the debts used to build those assets don’t disappear. Image
Read 20 tweets
Jan 24
From Credit Creation to Claim Enforcement: Debt Service, Labour Share, and Balance-Sheet Constraints

"Macroeconomic models that omit leverage and debt service as state variables are therefore empirically incomplete for the purposes of analysing modern inflation and distribution dynamics in high-debt economies."Image
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Read 32 tweets
Jan 23
Services Inflation Dynamics, Housing Pass-Through, and the Misinterpretation of Wage Inflation

"In sum, services inflation in the United States is best understood as a housing-anchored, lag-driven process in which wages play an adaptive rather than causal role." Image
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Read 71 tweets
Jan 14
Solving Tarullo’s Inflation Puzzle:

A Balance-Sheet Theory of Inflation Control

"Solving Tarullo’s inflation puzzle requires shifting the theoretical object of inflation from slack and beliefs to balance-sheet consistency." Image
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Read 21 tweets
Jan 9
Balance-Sheet Constraints and Macro Dynamics: Evidence from the United States

A Proof-by-Triangulation from Profits, Housing, and Asset Prices Image
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Read 20 tweets
Dec 20, 2025
House Prices, Rents, and Wage Adjustment: Evidence from the U.S. Services Inflation Pipeline Image
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Read 22 tweets

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