The Costs of Inflation in New Keynesian Models

Ambler describes three new channels through which inflation affects economic welfare in New Keynesian models. These channels were absent from traditional analyses and may have caused researchers to underestimate the costs associated with variable inflation, even at relatively low levels of inflation. The article concludes with a preliminary assessment of the quantitative importance of the new channels and their significance for monetary policy.

Nominal Wage Rigidity as a Nash Equilibrium

Models of the microfoundations of nominal price rigidities show that in the absence of real rigidities, individual firms have strong incentives to adjust prices even if other firms do not: price rigidity is not a Nash equilibrium unless the fixed cost of adjusting prices is implausibly high. This paper shows that nominal wage rigidity can be supported as a Nash equilibrium with relatively small adjustment costs and without real rigidities. The size of the necessary adjustment costs decreases labor supply elasticity increases, but is quite small for empirically plausible values of the latter. The minimum adjustment cost is relatively insensitive to the degree of substitutability between types of labor in production.Nominal Wage Rigidity, Nash Equilibrium

Narrating the real corporate story

Companies are being pressed to be more transparent in their annual reporting and, at the same time,interest is moving from the formal accounts to the narrative sections, partly in response to the increasing importance of the intangible assets not on the balance sheet. The paper sets out the changes in UK requirements, ummarised in a Framework provided by the Worshipful Company of Marketors, and company practice. The two weakest areas in relation to the Accounting Standards Board Reporting Standard are the provision of forward looking information and non-financial KPIs, especially those to do with customers, competitors and brands. The paper suggests that brand equity, the intangible marketing asset, is the present reservoir of future cash flow. Accordingly, provision of professional measures of brand equity should go some way towards solving both weaknesses at the same time

Price-Level Targeting and Stabilization Policy: A Review

This article reviews arguments in the literature for and against price-level targeting, focusing on its costs and benefits compared with inflation targeting. Benefits of price-level targeting include the effect on forward-looking inflation expectations; the ability to substitute for commitment by a central bank to its future policies; lessening forecast errors; better economic performance in response to real shocks because of lower wage indexation; and a reduction in the problem of the zero lower bound on nominal interest rates. Strict price-level targeting is not appropriate when inflation expectations are not fully forward-looking, and targeting the overall price level may be harmful if there are volatile movements in some of its components.

Time-Consistent Control in Non-Linear Models

We show how to use optimal control theory to derive optimal time-consistent Markov-perfect government policies in nonlinear dynamic general equilibrium models, extending the result of Cohen and Michel (1988) for models with quadratic objective functions and linear dynamics. We replace private agents' costates by flexible functions of current states in the government's maximization problem. The functions are verified in equilibrium to an arbitrarily close degree of approximation. They can be found numerically by perturbation or projection methods. We use a stochastic model of optimal public spending to illustrate the technique.Fiscal policy; Monetary policy framework