The impact of monetary policy on stock market bubbles and trading behavior: Evidence from the lab

We investigate the effect of monetary policy on stock market bubbles and trading behavior in experimental asset markets. We introduce the possibility of investing in interest bearing bonds to the widely used laboratory asset market design of Smith et al. (1988). Treatment groups face a variable interest rate policy which depends on asset prices, while control groups are subjected to a constant interest rate. We observe a strong impact of our interest rate policy on liquidity in the stock market but only a small impact on bubbles. However, we find that announcing the possibility of reserve requirements significantly reduces bubbles.     

Implications of the Changes in the System of National Accounts for Measured Growth and the Business Cycle*

The recent changes in the national accounts unequivocally imply that the nature of measured growth and the business cycle has changed. This note investigates to what extent.     

Local Linear Impulse Responses for a Small Open Economy*

Traditional vector autoregressions derive impulse responses using iterative techniques that may compound specification errors. Local projection techniques are more robust to this problem, and Monte Carlo evidence has suggested they provide reliable estimates of the true impulse responses. We use local linear projections to investigate the dynamic properties of a model for a small open economy, New Zealand. We compare impulse responses from projections to those from standard techniques, and consider the implications for monetary policy. We pay careful attention to the dimensionality of the model, and focus on effects of policy on gross domestic product, interest rates, prices and exchange rates.     

Evaluating New‐Keynesian Models of a Small Open Economy*

We suggest a strategy to evaluate members of a class of New‐Keynesian models of a small open economy. As an example, we estimate a modified version of the model in Svensson [Journal of International Economics (2000) Vol. 50, pp. 155–183] and compare its impulse response and variance decomposition functions with those a structural vector autoregression (VAR) model. The focus is on responses to foreign rather than to domestic shocks, which facilitates identification. Some results are that US shocks account for large shares of the variance of Canadian variables, that little of this influence is due to real exchange rate movements, and that Canadian monetary policy is not adequately described by a Taylor rule.     

Local and global indeterminacy in two-sector models of endogenous growth

We consider a two-sector endogenous growth model where the productions of the final good and human capital require economy-wide external effects. Assuming constant returns to scale at the private and social levels, we show that local and global indeterminacy of equilibrium paths are compatible with any values for the elasticity of intertemporal substitution in consumption and any sign for the capital intensity difference across the two sectors. We also show that for any value of the elasticity of intertemporal substitution in consumption, poverty traps may occur when the final good sector is capital intensive in human capital.     

Optimal regulation of technical progress in natural monopolies with asymmetric information

The focus of this paper is to characterize regulatory mechanisms for natural monopolies to provide for optimal technical progress when information is asymmetric. We model a Bayesian-Nash game where the monopolist has private knowledge of the cost-reducing effects of R&D investment to generate process innovations. In the first case, a price-regulated, profit-maximizing firm whose R&D level is unobservable sets its R&D level efficiently to maximize profits at the output level chosen by the firm. However, the level of technical progress achieved by the firm in this case is too high from the regulator's point of view since, in the second-best regulated solution of interest, the regulator has to provide for the R&D expenditures, assumed sunk, as well as for information rents transferred to the firm. In a second case, it can be shown that if the regulator can observe and set limits on the firm's investment in R&D, social welfare is improved, even though the regulated investment level is no longer efficient at the output level chosen by the firm. The reason for the welfare improvement is that losses in consumer surplus due to a decrease in output and an increase in the price are offset by a decrease in information rents and R&D costs transferred, causing the social costs of public funds to fall. Received: 31 July 1994 / Accepted: 15 January 1999     

Multilateral aggregation-theoretic monetary aggregation over heterogeneous countries

We derive fundamental theory for measuring monetary service flows aggregated over countries within a multicountry area. We develop three increasingly restrictive approaches: (1) the heterogeneous agents approach, (2) the multilateral representative agent approach, and (3) the unilateral representative agent approach. These results are being used by the European Central Bank in construction of its Divisia monetary aggregates database, with convergence from the most general to the more restrictive approaches expected as economic convergence within the area proceeds. Our theory permits monitoring the effects of policy over a multicountry area, while also monitoring the distribution effects of policy among the countries.     

Existence of a competitive equilibrium in the Lucas (1988) model without physical capital

This paper considers an endogenous growth model with human capital accumulation. It gives sufficient conditions and a necessary condition for the existence of a unique competitive equilibrium with externalities. These conditions are more stringent than those which prevail for the existence of an equilibrium defined as the solution to a fixed-point problem.     

Fiscal deficits and current account deficits

Recent fiscal stimulus packages depend for their effectiveness on the assumption of non-Ricardian savings behavior. We show that, under the same assumption, higher fiscal deficits can have problematic implications if they turn out to be permanent. First, if they occur in large countries they significantly raise the world real interest rate. Second, they cause a short run current account deterioration equal to around 50% of the fiscal deficit deterioration. Third, the longer run current account deterioration equals almost 75% for a large economy such as the United States, and almost 100% for a small open economy.     

Rational asset pricing bubbles and debt constraints

Rational price bubble arises when the price of an asset exceeds the asset’s fundamental value, that is, the present value of future dividend payments. The important result of Santos and Woodford (1997) says that price bubbles cannot exist in equilibrium in the standard dynamic asset pricing model with rational agents facing borrowing constraints as long as assets are in strictly positive supply and the present value of total future resources is finite. This paper explores the possibility of asset price bubbles under endogenous debt constraints induced by limited enforcement of debt repayment. Equilibria with endogenous debt constraints are prone to have infinite present value of total resources. We show that asset price bubbles are likely to exist in such equilibria. Further, we demonstrate that there always exist equilibria with price bubbles on assets in zero supply.     

Equivalence of utilitarian maximal and weakly maximal programs

For a class of aggregative optimal growth models, which allow for a non-convex and non-differentiable production technology, this paper examines whether the set of utilitarian maximal programs coincides with the set of weakly maximal programs. It identifies a condition, called the Phelps–Koopmans condition, under which the equivalence result holds. An example is provided to demonstrate that the equivalence result is invalid when the Phelps–Koopmans condition does not hold.     

Portfolio constraints,differences in beliefs and bubbles

I propose an arbitrage-based theory of bubbles in economies with general portfolio constraints and differences in beliefs. I find that, in general, bubbles cannot exist unless the constraints restrict the demand for credit sufficiently to induce low interest rates. Speculation due to heterogeneous beliefs does not cause bubbles. Ruling out bubbles under asymmetric information requires stronger assumptions: the presence of some uninformed agents and mild portfolio restrictions (debt or borrowing constraints), or alternatively, the existence of some impatient and fully informed agents.     

Money and economic development: A long-run perspective

This article explores the association between money and long-run economic growth in a panel of 27 countries over 200 years. It presents evidence of a complementarity between freedom and decentralisation of the monetary system in terms of their contribution to growth in GDP per capita. The significant and positive association between freedom and economic growth is found to be significantly stronger in a decentralised (market-based) than in a centralised (government-controlled) monetary system. For the average level of freedom across the 27 countries today, shifting from a centralised to a decentralised monetary system is predicted to almost double growth rates.     

Does Liquidity Matter? Properties of a Divisia Monetary Aggregate in the Euro Area*

This paper builds a quarterly Divisia monetary aggregate for the euro area using area‐wide data over the sample period from 1980 to 2000, finding two main results. First, it is found that the demand for this monetary aggregate has been well behaved and relatively stable over the last two decades. Secondly, the Divisia‐weighed monetary aggregate is found to have interesting information content from a forward‐looking perspective. This lends support to the view that money and – in a broader sense – liquidity services should be assigned an important role in shaping monetary policy in the euro area, although the policy maker is not interested in monetary aggregates per se.     

Consumption and Aggregate Constraints: International Evidence*

This paper documents that region‐level consumption exhibits excess sensitivity to lagged region‐level income in Italy, Japan, Spain, the UK and West Germany. However, region‐specific consumption exhibits substantially less sensitivity to lagged region‐specific income. Moreover, excess sensitivity is inversely related to standard measures of openness and credit market integration and for most countries, it has decreased over time. These findings are consistent with the results reported by Ostergaard et al. [Journal of Political Economy (2002) Vol. 110, pp. 634–645] for US states and Canadian provinces, and provide empirical support for the hypothesis that closed‐economy constraints may partly be responsible for the excess sensitivity phenomenon in aggregate data.     

Optimal strategies in linear multisector models: Value function and optimality conditions

In this paper we study an optimal control problem with mixed constraints related to a multisector linear model with endogenous growth. The main aim is to establish a set of necessary and a set of sufficient conditions which are the basis for studying the qualitative properties of optimal trajectories. The presence of possibly degenerate mixed constraints, the unboundedness and non-strict convexity of the Hamiltonian, make the problem difficult to deal with. We develop first the dynamic programming approach, proving that the value function is a bilateral viscosity solution to the associated Hamilton–Jacobi–Bellman (HJB) equation. Then, using our results, we give a set of sufficient and a set of necessary optimality conditions which involve so-called co-state inclusion: this can be interpreted as the existence of a dual path of prices supporting the optimal path.     

A unified theory of structural change

This paper uses dynamic general equilibrium and computational methods, inspired by the multi-sector growth model structure in Stephen Turnovsky's work, to develop a theory that unifies two of the traditional explanations of structural change: sector-biased technical change and non-homothetic preferences. The theory is based on an overlapping-generations growth model with endogenous technical change and non-homothetic preferences. An expanding-variety setup with two different R&D technologies, agricultural, and non-agricultural, is employed. The analysis, based on numerical simulations, shows that the biased technical change hypothesis finds most support in the data. It also points to production-side specific factors, such as asymmetries in cross-sector knowledge spillovers, as explanatory factors of the bias in technical change.     

刀具半径补偿指令在数控铣上的应用

文章通过对刀具半径补偿功能的分析,总结出刀具半径补偿功能要点,给编程和加工带来很大的方便。     

Monetary Frameworks and Institutional Constraints: UK Monetary Policy Reaction Functions, 1985–2003

Monetary policy reaction functions are estimated for the UK over three periods – 1985–90, 1992–97 and 1997–2003 – in order to disentangle two effects: the switch from an emphasis on exchange rate stabilization to inflation targeting, and the introduction of instrument-independence in 1997. The external factors considered include US as well as German interest rates, and this leads to the identification of 'domestic' and 'international' models of the reaction function. The results suggest that it is the changes in the institutional arrangements rather than those in the targeting regime which have been decisive in the development of policy in this period.     

Voluntary contributions to multiple public goods in a production economy with widespread externalities

In a production economy, multiple public goods are produced by firms in competitive markets, and provided by the government together with contributions from consumers. There are widespread externalities: all consumers’ consumption and contributions and all firms’ production enter into utility functions. Public goods can be imperfect substitutes or complements, and they can be local public goods or club goods. Zero bounds that require consumers to make nonnegative contributions complicate the differentiable approach. Applying the transversality theorem for smooth economies in a regular parameterization, we obtain the existence of equilibrium in such an economy, and generically equilibria are regular and locally unique.