Ecosystem and Economy: An Integrated Dynamic General Equilibrium Approach

A dynamic general equilibrium model is developed for analyzing economy-ecosystem interactions. It includes stock-flow relations of natural resources, species populations and pollution, and it provides a microfoundation of the growth of populations. Humans and (other) species compete for natural resources and (prey) biomass. Resource stocks, pollution and populations determine public ecosystem services which in turn affect all agents in both the ecosystem and the economy. We establish a benchmark market system encompassing Lindahl markets for ecosystem services and emission markets. We also analyze a system where those two types of markets break down (laissez-faire) and propose efficiency restoring policies.     

Stock-flow matching and the performance of the labor market

We estimate outflow equations for vacancies and unemployed workers in Britain, departing from the stock-based analysis of matching in two ways. First, we deal with the temporal aggregation problem that arises when discrete time data are used to describe continuous time processes. Second, we allow for a stock-flow matching mechanism in which the stock of traders on one side of the market matches with the flow of traders on the other side. Our estimates are in line with the predictions of stock-flow matching in terms of higher exit rates of flows and of matching combinations between labor market stocks and flows. Furthermore, employer search effectiveness did not seem to decline between the 1960s and the 1990s. Nevertheless, some deterioration in worker search effectiveness is detected, however less severe than that implied by previous, stock-based work.     

Stock adjustment for multicointegrated series

A typical stock adjustment model is a partial ajustment process to maintain simultaneously the two kinds of equilibrium relationships: a flow-flow relationship and a stock-flow relationship. We show that the stock adjustment model is an error correction model of ‘multicointegrated’ time series, and also an optimal decision rule generated from an intertemporal optimization problem. Economic examples in inventory model, housing construction, and consumption function are discussed.     

Some comments on the Sraffian Supermultiplier approach to growth and distribution

Abstract

The article discusses the Sraffian Supermultiplier (SSM) approach to growth and distribution. It makes 5 points. First, in the short run, the role of autonomous expenditure can be appreciated within a standard post Keynesian framework (Kaleckian, Kaldorian, Robinsonian, etc.). Second, and related to the first, the SSM model is a model of the long run and has to be evaluated as such. Third, in the long run, one way that capacity adjusts to demand is through an endogenous adjustment of the rate of utilization. Fourth, the SSM model is a peculiar way to reach what Garegnani called the “second Keynesian position.” Although, it respects the letter of the “Keynesian hypothesis,” it makes investment quasi-endogenous and subjects it to the growth of autonomous expenditure. Fifth, in the long run it is unlikely that “autonomous expenditure” is really autonomous. From a stock-flow consistent point of view this implies unrealistic adjustments after periods of changes in stock-flow ratios. Moreover, if we were to take this kind of adjustment at face value, there would be no space for Minskyan financial cycles. This also creates serious problems for the empirical validation of the model.     

Human-induced earthquakes,risk salience,and housing values

Oklahoma’s households have recently faced several thousand higher-probability but low-impact earthquakes induced by nearby shale gas development. This type of seismic activity is different from natural-occurring earthquakes, which are generally constituted by one, high-loss event. We investigate the mechanisms through which earthquakes may influence household perceptions of risk by modeling changes to property values in and out of seismically-active zones. We estimate that the induced earthquakes are spatially concentrated, which is partially influenced by governmental limits placed on natural gas production and wastewater injections. Additionally, we explore the underlying measure of earthquake intensity and identify its importance in modeling seismic impacts. Controlling for the stock-flow dynamics of seismicity through time, we estimate that Oklahoma County’s cumulative experience of earthquakes led to a diminution of property values. The impacts are further exacerbated by risk-saliency effects, as reflected in declining values associated with nearby wastewater injections and natural gas production.     

Financialization and the macroeconomy. Theory and empirical evidence

This paper sheds light on the macroeconomic impact of financialization in the banking sector. We develop a new stock-flow consistent model, which reveals that excessive leverage increases financial fragility, lowers wages, and slows down real sector investment and GDP growth. Using a panel of 29 high income countries, we then construct indicators of banking financialization and investigate the impact of the latter on the wage share, gross capital formation and GDP growth, using a Bayesian structural VAR framework, as well as a set of fixed effect regressions. Our results highlight that financialization has had a detrimental impact on real sector growth. Finally, we discuss the implications of our results to propose reforms to the international financial system.     

Balance sheet changes and the impact of financial sector risk-taking on fiscal multipliers

We analyse implications of financial sector dynamics for fiscal expenditure multipliers in recessionary conditions. A new stock-flow consistent model is developed in which a financial sector with four financial instruments is integrated with the real sector. The transmission of policy innovations occurs through balance sheet effects. Higher government expenditure increases aggregate demand in the economy. This reduces the perceived probability of default on financial institutions’ loans, increases asset valuations, and leads financial institutions to reduce interest rate spreads. Expectations of higher future wealth and a reduction in credit constraints supports consumption growth. Stronger balance sheets across institutions and lower interest rates increase investment. The interaction between growth and balance sheet valuations creates financial accelerator effects though its impact on financial sector risk-taking. Inflows of foreign savings can increase the multiplier further than would be the case in a closed economy constrained by domestic savings. The results show that fully modelling interactions between real and financial sectors generates fiscal multipliers higher than have been found for South Africa in other types of model.     

The origins,development, and fate of Clower's “stock-flow” general-equilibrium programme

Before becoming the hallmark of macroeconomics à la Wynne Godley, the “stock-flow” analysis was already developed in microeconomics and general-equilibrium theory. The goal was to study the formation of economic plans and the determination of market prices when individuals were supposed to consume, produce, and hold commodities. I show that since the early 1950s, Robert W. Clower used the “stock-flow” price theory to offer microfoundations to a Keynesian business cycle model. I analyse the origins of this microfoundation programme, trace its development, and discuss its fate.     

Keynesian theorising during hard times: stock-flow consistent models as an unexplored 'frontier' of Keynesian macroeconomics

This paper argues that the stock-flow consistent approach tomacroeconomic modelling (SFCA) is a natural outcome of the pathtaken by Keynesian macroeconomic thought in the 1960s and 1970s,a theoretical ‘frontier’ that remained largely unexploredwith the end of Keynesian academic hegemony. It does so in twosteps. First, it phrases the representative views of Davidson,Godley, Minsky and Tobin as different ‘closures’of the same (SFC) accounting framework, calling attention totheir similarities and logical implications. Second, it discussesunresolved issues within this approach and how it differs from‘modern’ theorising.     

Further insights on endogenous money and the liquidity preference theory of interest

Abstract

We present a simple stock-flow consistent (SFC) model to discuss some recent claims made by Angel Asensio in a paper published in this journal regarding the relationship between endogenous money theory and the liquidity preference theory of the rate of interest. We incorporate Asensio’s assumptions as far as possible and use simulation experiments to investigate his arguments regarding the presence of a crowding-out effect, the relationship between interest rates and credit demand, and the ability of the central bank to steer interest rates through varying the stock of money. We show that in a fully-specified SFC model, some of Asensio’s conclusions are not generally valid (most importantly, the presence of a crowding-out effect is ambiguous), and that in any case, his use of a non-SFC framework leads him to leave aside important mechanisms which can contribute to a better understanding of the behavior of interest rates. More generally, this paper once more demonstrates the utility of the SFC approach in research on monetary economics.     

Identifying spatial interactions in the presence of spatial error autocorrelation: An application to land use spillovers

Spatial spillovers—interaction effects among neighboring agents in space—are a common characteristic of a variety of processes that are of interest to environmental and resource economists. Empirical identification of these interactions is challenging, however, due to the endogenous nature of the interactions and the inevitable unobserved spatial correlation that, if uncontrolled, can result in spurious estimates of the interaction parameters. Traditional spatial econometric models rely on maintained assumptions that impose separate structures for the spatial error and interaction processes and thus are insufficient for solving this identification problem. To identify spatial land use spillovers in a hedonic model of residential housing values, we pursue an alternative approach by exploiting a natural experiment in the data. We use exogenous physical land features that impose a direct constraint on residential development on some, but not all, of the land that falls within our study region and use this to construct a “partial population identifier.” We find that this estimation strategy solves the endogeneity problem and reduces spatial error autocorrelation, but does not fully eliminate it. Estimation of the model using a more restricted sample in combination with the partial population identification strategy is successful in eliminating the remaining spatial error autocorrelation. We conclude that less restrictive approaches to controlling for unobserved spatial correlation, such as the natural experiment pursued here, may provide a superior alternative to identifying spatial spillovers.     

Creative accounting and electoral motives: Evidence from OECD countries

Using an unbalanced panel of 27 OECD countries over the period 1970–2011, I examine whether electoral motives influenced creative accounting. Governments engage in “below-the-line” operations, such as transactions in financial assets, that do not show up in the deficit figures but give rise to changes in debt. I use the difference between the change in public debt and the deficit (stock-flow adjustment) to measure creative accounting. The results suggest that governments strategically engaged in creative accounting before regular elections so as to sugarcoat the budget balance. I also provide an overview of government interventions that gave rise to large stock-flow adjustments.     

Stock-flow matching

We develop the implications of the stock-flow matching model for unemployment, vacancies, and worker flows. Workers and jobs are heterogeneous, so most worker-job pairs cannot profitably match, leading to the coexistence of unemployment and vacancies. Productivity shocks cause fluctuations in the number of jobs, which in turn cause fluctuations in other labor market variables. We derive exact expressions for employment and for worker transition rates in a finite economy and analyze their limiting behavior in a large economy. A calibrated version of the model is consistent with the observed co-movement and volatility of labor market variables.     

Preference for flexibility in infinite horizon problems

Summary. We consider the extension of the classical problem of preference for flexibility to many periods. Preferences are defined over sets of infinite paths of choices. The main result provides a set of axioms on preferences that yield an additive representation over a subjective state space. This space is the set of preferences over choice today and feasible set tomorrow. The main new axiom, stochastic dominance, is a stronger form of the assumption of monotonicity. Received: September 11 2000; revised version: December 18, 2001     

资金流量存量核算与金融风险的文献综述——基于虚拟经济的视角

资金流量存量核算与金融风险的关系已受到众多学者关注,但学界对这一问题尚未进行系统性梳理并取得整体认知.本文通过回顾资金流量核算、资金存量核算、间接测算的金融中介服务、存量流量一致性理论模型等分析金融风险的相关文献发现,现有资金流量存量核算中,存在忽视名义变量和交易量、将金融风险计为GDP的增长、对存量流量一致性理论模型...     

A model of decision making in an ecologically realistic environment: Relative comparison and the Independence of Irrelevant Alternatives

Models of behavior in a variety of areas often assume that decision-makers will adhere to the axioms of economic rationality. This requires that outcomes can be assigned objective values by stable evaluation frameworks. Yet both human and animal behavior is often not economically rational. Instead relative comparison of options is often used to assess value. We are interested in conditions that might lead natural selection to favor relative comparison of options over behavior that is consistent with the axioms of rationality. We compare an economically rational strategy with a relative comparison strategy (trade-off contrast). We model these strategies in a simple environment where decisions are multi-period; there is stochastic fluctuation in the choices available at any given time; and uncertainty about what choices will be available in the future. We investigate five levels of interaction between the attributes of the options that range from perfect complementarity to perfect substitutability. Our results show that, for some of the parameter space, a non-rational strategy achieved higher fitness than an economically rational strategy and that these differences were large enough to be biologically significant.     

Expected utility theory without the completeness axiom

We study the problem of obtaining an expected utility representation for a potentially incomplete preference relation over lotteries by means of a set of von Neumann-Morgenstern utility functions. It is shown that, when the prize space is a compact metric space, a preference relation admits such a multi-utility representation provided that it satisfies the standard axioms of expected utility theory. Moreover, the representing set of utilities is unique in a well-defined sense.     

Conflicting Claims and Equilibrium Adjustment Processes in a Stock-flow Consistent Macroeconomic Model

We revisit the old but still vibrant Post-Keynesian debate over ‘fully-adjusted positions’, defined by the long-run equality of actual and standard utilisation rates. The central proposition of this paper is that in a world where different groups inside and outside firms have different objectives, the equality of actual and standard utilisation should not be treated as the only possible long-run equilibrium condition. The argument is illustrated in a model of target return pricing with conflict inflation, building on the work of Marc Lavoie. A ‘common language’ for the conflicting claims by shareholders, managers and workers is developed in terms of target profit rates, and it is shown that these contradictory claims can be partly reconciled through variations in the utilisation rate. The analysis unifies history and equilibrium in the sense that the nature of final equilibrium position and the adjustment to it depend on the objectives of the dominant social groups. We distinguish a ‘Fordist regime’ and a ‘financialisation regime’ and produce simulation results within a simple stock-flow consistent model that are broadly consistent with the stylised facts of these distinct historical phases of capitalism.     

Endogenous business cycles and Harrodian instability in an agent-based model

The article presents an original stock-flow consistent macroeconomic agent-based model with the aim to reexamine Harrod’s instability principle as an explanatory element of macroeconomic dynamics. The main findings are that bottom-up economic models can be subject to Harrodian instability and can produce endogenous cycles without introducing innovation waves, monetary wage spirals, or financial instability. Upward instability is stopped by the ceiling of full employment, and downward instability can be tamed by introducing an autonomous expenditure that feeds aggregate demand.     

On the consistency of stationary Markov equilibria with an exogenous distribution

A technique to show the existence of stationary Markov equilibria is provided by Duffie, Geanakoplos, Mas-Colell and McLennan Econometrica 62 (1994) 745-781. In many applications, a state space is constructed as the product of a space of exogenous variables and a space of endogenous variables. In addition, the exogenous shock is given and is a Markov process with a transition probability and an initial distribution. Then their theorem does not ensure the existence of a stationary Markov equilibrium that is consistent with the exogenous distribution. In this paper, we give a sufficient condition for settling the inconsistency problem.