A functional approach for studying technological progress: Extension to energy technology

This paper extends a broad functional category approach for the study of technological capability progress recently developed and applied to information technology to a second key case—that of energy based technologies. The approach is applied to the same three functional operations—storage, transportation and transformation—that were used for information technology by first building a 100 plus year database for each of the three energy-based functional categories. In agreement with the results for information technology in the first paper, the energy technology results indicate that the functional approach offers a stable methodology for assessing longer time technological progress trends. Moreover, similar to what was found with information technology in the first study, the functional capability for energy technology shows continual—if not continuous—improvement that is best quantitatively described as exponential with respect to time. The absence of capability discontinuities—even with large technology displacement—and the lack of clear saturation effects are found with energy as it was with information. However, some key differences between energy and information technology are seen and these include:

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Lower rates of progress for energy technology over the entire period: 19-37% annually for Information Technology and 3-13% for Energy Technology.

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Substantial variability of progress rates is found within given functional categories for energy compared to relatively small variation within any one category for information technology. The strongest variation is found among capability progress among different energy types.

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More challenging data recovery and metric definition for energy as compared to information technology.

These findings are interpreted in terms of fundamental differences between energy and information including the losses and efficiency constraints on energy. We apply Whitney's insight that these fundamental differences lead to naturally modular information technology artifacts. The higher progress rates of information-based as opposed to energy-based technologies follows since decomposable systems can progress more rapidly due to the greater ease of independent as opposed to simultaneous development. In addition, the broad implications of our findings to studies of the relationships between technical and social change are briefly discussed.     

An experimental study of information and mixed-strategy play in the three-person matching-pennies game

Summary. Recent experiments on mixed-strategy play in experimental games reject the hypothesis that subjects play a mixed strategy even when that strategy is the unique Nash equilibrium prediction. However, in a three-person matching-pennies game played with perfect monitoring and complete payoff information, we cannot reject the hypothesis that subjects play the mixed-strategy Nash equilibrium. Given this support for mixed-strategy play, we then consider two qualitatively different learning theories (sophisticated Bayesian and naive Bayesian) which predict that the amount of information given to subjects will determine whether they can learn to play the predicted mixed strategies. We reject the hypothesis that subjects play the symmetric mixed-strategy Nash equilibrium when they do not have complete payoff information. This finding suggests that players did not use sophisticated Bayesian learning to reach the mixed-strategy Nash equilibrium. Received: August 9, 1996; revised version: October 21, 1998     

Tests of the “convergence hypothesis”: Some further results

The article presents new tests of the convergence hypothesis. It first analyzes the unconditional pattern of growth of human and physical capital (conventionally measured by an inventory method) and shows that these tests do support the hypothesis that domestic inputs of poor countries appear to be catching up with those of rich countries. On the other hand, when one analyzes the pattern of growth of physical capital and Solow residual, then one is led to reject the convergence theory. Building on this discrepancy, I demonstrate that the poor countries have failed to catch up with rich ones because the progress that they have achieved in educating their workers (which is evidenced in the convergence of domestic inputs) is not sufficient to compensate for their poor endowment in the knowledge on which the education of workers stands.     

Decision Making Costs and Problem Solving Performance

We report the results from an experimental study of how problem solving behavior is affected by financial rewards. We formulate three alternative hypotheses: costly rationality, extrinsic/intrinsic trade-off, and distraction effects. Subjects play a computerized version of the Tower-of-Hanoi game and report their beliefs about the optimal solution through a quadratic scoring rule. Subjects participate in one of two treatments: a high penalty and a low penalty. We find that eliciting beliefs, in addition to observing playing behavior, reveals useful information about subjects' cognitive behavior. We reject our hypothesis that the increase in the extrinsic penalty affects the intrinsic valuation in such a way as to decrease the amount of effort applied.     

Segmented labour markets and the estimation of wage functions

This paper uses a stratified random sample of private sector employees to estimate wage equations for both the male labour market as a whole and six ‘segments’ of the labour market, segement which are defined with respect to the industry and size characteristics of the employing establishmen. Highly conventional results are obtained when wage equations are estimated for the male labour market as a whole, or within two segements, comprising almost half the survey population. However, one can reject conclusively the hypothesis that the same estimating equation is appropriate for modelling wage determination in all segments and if a ‘human capital’ (HK) model is, within segements, tested against more appropriate alternative hypotheses for wage determination using the Davidson and Mackinnon (1981) methodology for the testing of non-nested hypotheses, the conclusion is that one should reject the HK specification and not reject the alternative.

It is therefore argued that the disaggregation of labour market data reveals differences in the wage determination process that are not consistent with the view that labour markets are ‘dualistic’ but are consistent with the view that are segmented.     

Quantile unit root test and the PPP in Africa

In this study, we apply the Quantile unit root test and revisit the Purchasing Power Parity (PPP) in 20 African countries using real effective exchange rates over the period 1971Q1 to 2012Q4. While traditional unit root tests fail to reject unit root hypothesis in most of the countries, results from Quantile unit root test reject unit root null hypothesis in Ghana, Mauritius, Niger, South Africa, and Togo, providing support for the PPP at least in these five countries. We further estimate the half-life based on Quantile autoregressive (QAR) model to be about 4.57–7.96 quarters (1–2 year).     

Modeling the behaviour of inflation deviations from the target

This study tests for and models non-linearities in inflation deviations from the target in five OECD countries that adopted inflation targeting over the 1990s. Our tests reject the linearity hypothesis and we show that the exponential smooth transition autoregressive (ESTAR) model is capable of capturing the non-linear behavior of inflation misalignments. The extent of inflation deviations from the target varies across the OECD countries, with countries that consistently undershoot the target having a rapid adjustment process, whereas countries that overshoot the target have a slower revision back to equilibrium. Out-of-sample forecasts from the ESTAR model outperform the Markov regime-switching model.     

An empirical note on international R&D spillovers

Whether international R&D spillovers are global and trade-related is still a debated issue. By adopting two specifications that nest models previously estimated in the literature, we test the hypothesis that international R&D spillovers are global and trade-unrelated for a sample of OECD countries over the period 1971–2004. In particular, via a randomization exercise, we reject the null hypothesis of a “global pool of technology” and show that there are partitions of countries associated with relatively strong/weak knowledge spillovers. Then, we estimate a nonlinear specification that includes simultaneously geographical distance and international trade among the determinants of domestic TFP. We find robust evidence that both factors affect how foreign knowledge impacts on the domestic productivity of each recipient country.     

R&D, innovation, and technological progress: a test of the Schumpeterian framework without scale effects

Abstract.  I use U.S. manufacturing industry data to estimate a system of three equations implied by a model of R&D‐induced growth in steady state. These equations relate R&D intensity to patenting, patenting to technological progress, and technological progress to economic growth. In each case, I find evidence of positive impact. Thus, I reject the null hypothesis that growth is not induced by R&D in favour of the Schumpeterian endogenous growth framework without scale effects. I also find strong support for technological spillovers from aggregate research intensity to industry‐level innovation success. JEL Classification: O40, O30     

Is there chronic excess supply of labor?: Designing a statistical test

We devise and implement a statistical test of the hypothesis that the labor market has chronic excess supply. We find that the data reject this hypothesis.     

A nonlinear approach to testing the unit root null hypothesis: an application to international health expenditures

In this article, we examine the unit root null hypothesis for per capita total Health Expenditures (HEs), per capita private HEs and per capita public HEs for 29 Organization for Economic Co-operation and Development (OECD) countries. The novelty of our work is that we use a new nonlinear unit root test that allows for one structural break in the data series. We find that for around 45% of the countries, we are able to reject the unit root hypothesis for each of the three HE series. Moreover, using Monte Carlo simulations, we show that our proposed unit root model has better size and power properties than the widely used Augmented Dickey–Fuller (ADF) and Lagrange Multiplier (LM) type tests.     

Option-implied preferences adjustments, density forecasts, and the equity risk premium

The main objective of this paper is to analyse the value of information contained in prices of options on the IBEX 35 index at the Spanish Stock Exchange Market. The forward looking information is extracted using implied risk-neutral density functions estimated by a mixture of two-lognormals and several alternative risk adjustments. Our results show that, between October 1996 and March 2000, we can reject the hypothesis that the risk-neutral densities provide accurate predictions of the distributions of future realisations of the IBEX 35 index at 4- and 8-week horizons. When forecasting through risk-adjusted densities the performance of this period is statistically improved and we no longer reject that hypothesis. We show that risk adjustments based on a power specification for the stochastic discount factor—which is the approach used so far in the literature that derives the objective density function from option prices- generates an excessive volatility of risk premia. We use alternative risk adjustments and find that the forecasting performance of the distribution improves slightly in some cases when risk aversion is allowed to be time-varying. Finally, from October 1996 to December 2004, the ex-ante risk premium perceived by investors and that are embedded in option prices is between 12 and 18% higher than the premium required to compensate the same investors for the realised volatility in stock market returns.      

Financial Deregulation and Stability of Money Demand: The Australian Case

This paper analyses the Australian economy in the post-war period. The analysis examines stationarity and cointegrating relationship among output, interest rate and money. The analysis shows that Australia has had a stable cointegrating relationship among output, interest rate and money during the post-war period although the country deregulated its financial sector in the 1980's. Australia's money demand function fails to reject the hypothesis that the interest elasticity of money demand is 0.5. In addition, one specification of the country's money demand function fails to reject the hypothesis that the income elasticity of money demand is unity. The specification is the Vector Error Correction Model that includes real output, real balances, an interest rate, and a deregulation dummy variable, with the lag length of three.     

低碳技术是否能成为新一轮经济增长点?——低碳技术与IT技术对经济增长影响的比较研究

技术进步是经济增长的重要决定因素。本文从投资、有效劳动投入量及生产率这三方面剖析了低碳技术与IT技术对经济增长的不同影响机制,分析了在保持当前技术发展速度的前提下,低碳技术将成为新一轮经济增长点的原因,并提出了相应的政策建议。     

‘I’ve been to Bali too’ (and I will be going back): are terrorist shocks to Bali's tourist arrivals permanent or transitory?

International visitor arrivals to Bali are examined using univariate and panel Lagrange multiplier (LM) unit root tests with one and two structural breaks to ascertain if shocks to the time path of tourist arrivals are permanent or transitory. The univariate LM unit root tests with one and two structural breaks fail to reject the null hypothesis of a unit root in international visitor arrivals to Bali. However, the panel LM unit root tests with one and two structural breaks applied to a panel of Bali's 11 major source markets reject the null and support the alternative hypothesis of a joint trend-stationary series with transitory shocks. This result suggests that, the effects of the recent terrorist acts on Bali on the growth path of tourist arrivals from major markets are only transitory and that as a consequence Bali's tourism sector is sustainable in the long run.     

Is there a daily discount rate? Evidence from the food stamp nutrition cycle

Quasi-hyperbolic discounting predicts impatience over short-run tradeoffs. I present a direct non-laboratory test of this implication using data on the nutritional intake of food stamp recipients. Caloric intake declines by 10 to 15 percent over the food stamp month, implying a significant preference for immediate consumption. These findings constitute a rejection of the permanent income hypothesis and are extremely difficult to reconcile with exponential discounting. The data support an explanation based on time preference and reject several alternative explanations, including highly elastic intertemporal substitution. I explore implications for the optimal timing of transfer payments under alternative assumptions about preferences.     

Assessment of the theory of comprehensive national accounting with data for Portugal

We present time-series tests of the quality of genuine savings and green net national income for predicting welfare changes. These tests check the validity of the theory of comprehensive national accounting, and more broadly of the theory of economic growth. The value of technological progress is included, as well as the effects of business cycles. We use estimates for Portugal as inputs. Overall, our results indicate that both genuine savings and changes in green net national income have the same sign as changes in welfare, but reject the hypothesis that the estimated comprehensive national accounting measures coincide with the theoretical expressions. The results also suggest that comprehensive accounting indicators perform better than conventional national accounting indicators, implying that, in general, the corrections proposed by the comprehensive accounting theory add explanatory power to conventional measures. The exception is the inclusion of education expenditures and technological progress, which decrease explanatory power. Excluding business cycles from green net national income increases the agreement with the theory. Comparing both indicators, in general, genuine savings presents better results.     

Convergence in Productivity Across Industries: Some Results for New Zealand and Australia

New Zealand shares a wealth of common interests and experiences with Australia. This has tempted some to assume that these economies form an ‘Economic Club’, in which one would expect to identify common aggregate trends and growth experiences. In this paper we present results that test, and generally reject, convergence in labour productivity across Australia and New Zealand, using both aggregate and disaggregate, industry‐level data. We find that only two industries satisfy our definition of Conditional Convergence (Agriculture, Forestry and Fishing and Cultural and Recreational Services), and that the Mining and Wholesale Trade industries have particularly important roles to play in explaining the measured divergence. Cointegration‐based tests reveal more stochastic trends governing Australian productivity than in New Zealand. The evidence suggests, therefore, that the underlying growth processes of the two economies are fundamentally different, thereby questioning the relevance of aggregate comparisons between them. New evidence using industry‐level data does not, therefore, resolve the aggregate‐level ‘non‐convergence puzzle’ identified here, and elsewhere.     

Singapore's Manufacturing Sector's TFP Growth: A Decomposition Analysis

Singapore has been criticized recently for experiencing insignificant total factor productivity (TFP) growth. This paper examines whether this criticism is valid in the context of the manufacturing sector of Singapore. Using new data and the stochastic production frontier approach, TFP growth is decomposed into technological progress and changes in technical efficiency. While the results could not reject the hypothesis that Singapore's output growth is mostly input-driven, they show that, despite technological progress, technical inefficiency is the cause for the low and declining TFP growth in the manufacturing sector.J. Comp. Econom., December 2000, 28(4), pp. 828–839. The University of Queensland; Research School of Pacific and Asian Studies, The Australian National University.     

Testing for separability between commodity demand and labour supply in West Germany

In this paper we use a methodology for testing for separability of commodity demands from male and female labour supply on a single cross section. In the empirical section of our paper we apply the methodology to a representative micro data base for West Germany. We estimate the corresponding demand systems for nine goods, analyse their economic properties and test the hypothesis that male and female leisure are separable from commodity demand. We reject the hypothesis that goods are separable from male and female time. Moreover, we show the implications of our results for optimal taxation of goods and labour supply.