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Nov 15 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
Image
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

Nov 13
Empirically, U.S. Inflation Follows the Kalecki Distributional Equation

Inflation in the United States is primarily profit-led in structure, wage-amplified in the short run, and productivity-limited in scope. Image
This relation implies that inflation arises from the distribution of income between labor and capital, not from expectations. Image
Regression Results Image
Read 6 tweets
Nov 8
The Constant-Rate Interest Burden as the Hidden Driver of Capital Share: Evidence from Balance-Sheet Saturation

This balance-sheet mechanism explains the secular rise in the capital share and the decline in labor share observed since the 1980s without appealing to exogenous technology shocks.Image
Conceptually, it represents the interest-service load that would prevail if monetary policy had not reduced nominal rates in response to debt expansion. While the actual burden rtL/Y fluctuates with policy cycles, the constant-rate version isolates the structural leverage component, reflecting the underlying stock of liabilities relative to income.Image
Data and Methodology Image
Read 21 tweets
Nov 3
Ergodicity vs expected-utility assumes the return distribution is exogenous.
But in a credit economy, returns are endogenously driven by balance-sheet expansion (A≈L).
Investors maximize share of system claims subject to leverage guardrails — not abstract utility or stationary distributions.
Kelly works within a balance-sheet regime, not instead of one.
Read 17 tweets
Oct 31
The Labor Channel Is Not a Causal Driver of Inflation: VAR Evidence from the United States Image
Thus, inflation and wages are not driven by labor conditions; they respond to the credit cycle and the associated demand and price dynamics. The NK causal chain is reversed. Image
Contribution Image
Read 42 tweets
Oct 30
@ojblanchard1 @FrancoisGeerolf The canonical New-Keynesian three-equation model (NK Phillips–Euler–Taylor system) is not empirically salvageable because its core causal mechanism — slack-induced inflation — is reversed in the data. Image
@ojblanchard1 @FrancoisGeerolf Reversal of the New-Keynesian Inflation Mechanism: Evidence from Credit, Services Inflation, and Labor-Market Tightness Image
@ojblanchard1 @FrancoisGeerolf Introduction Image
Read 23 tweets
Oct 20
The Fed Tightened Into an Energy Shock: A Policy Error Explanation of the Global Financial Crisis

This interpretation challenges the standard NK narrative that the GFC was the result of exogenous financial frictions or regulatory failure alone (Bernanke, Gertler & Gilchrist 1999). Instead, it suggests that monetary policy itself was a causal amplifier of crisis dynamics.Image
....by tightening into a negative real-income shock, the Fed mechanically reduced household liquidity, which led to rising delinquency and default rates—first in adjustable-rate subprime mortgages and later system-wide as refinancing options collapsed (Gorton 2008). Image
...By relying on CPI-based inflation signals that masked energy cost dynamics and by ignoring balance-sheet fragility, the Fed tightened into a supply shock—an error similar in structure to the policy tightening that deepened the recessions following the oil shocks of the 1970s (Hamilton 1983; Blanchard & Galí 2007).Image
Read 13 tweets

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