Panel Seasonal Unit Root Test: Further Simulation Results and An Application to Unemployment Data
Christian Dreger, Hans-Eggert Reimers
AStA - Advances in Statistical Analysis,
No. 3,
2005
Abstract
In this paper the seasonal unit root test of Hylleberg et al. (1990) is generalized to cover a heterogenous panel. The procedure follows the work of Im, Pesaran and Shin (2002). Test statistics are proposed and critical values are obtained by simulations. Moreover, the properties of the tests are analyzed for different deterministic and dynamic specifications. Evidence is presented that for a small time dimension the power is slow even for increasing cross section dimension. Therefore, it seems necessary to have a higher time dimension than cross section dimension. The new test is applied for unemployment behaviour in industrialized countries. In some cases seasonal unit roots are detected. However, the null hypotheses of panel seasonal unit roots are rejected. The null hypothesis of a unit root at the zero frequency is not rejected, thereby supporting the presence of hysteresis effects.
Read article
Youth unemployment and the influence of parents: Is the East different?
Eva Reinowski
Wirtschaft im Wandel,
No. 7,
2005
Abstract
Für die Beschäftigungschancen junger Erwachsener spielt neben gesamtwirtschaftlichen Faktoren vor allem das eigene Ausbildungsniveau eine entscheidende Rolle. In Deutschland hat, stärker als in vielen anderen Ländern, die soziale Herkunft einen großen Einfluß auf den Bildungsweg von Jugendlichen und damit auf ihre Aussichten auf dem Arbeitsmarkt. Allerdings sind die Ausgangsbedingungen für Jugendliche in den alten und den neuen Bundesländern noch sehr unterschiedlich. Das dient als Ausgangspunkt für eine Untersuchung eventueller Unterschiede zwischen beiden Regionen bezüglich der Zusammenhänge zwischen der Qualifikation und dem Arbeitsmarkterfolg sowie zwischen sozialer Herkunft und Erwerbs- und Ausbildungsverhalten. Es wird festgestellt, daß die Zusammenhänge tendenziell ähnlich sind. Allerdings lassen sich partielle Unterschiede beobachten. So sind – trotz eines positiven Zusammenhangs von Ausbildungsniveau und Arbeitsmarkterfolg in beiden untersuchten Stichproben – die Erwerbschancen für gering- und unqualifizierte Jugendliche in den neuen Bundesländern und Berlin deutlich schlechter. Das deutet darauf hin, daß von einer angespannten Arbeitsmarktlage geringqualifizierte Jugendliche stärker betroffen sind. Der ebenfalls zu beobachtende deutliche Unterschied im Zusammenhang von Ausbildungsniveau der Jugendlichen und dem der Haushaltsbezugsperson erklärt sich zum großen Teil aus dem unterschiedlichen Qualifikationsniveau der Haushaltsbezugspersonen in beiden untersuchten Stichproben. Um einen Hinweis auf den Abbau der Nachteile von Kindern aus sozial schwachen Familien durch eine Förderung der Kinder im Vorschulbereich zu erhalten, bedarf es daher weitergehender Forschung unter Einbeziehung der Qualität des Betreuungsangebots.
Read article
An analysis of household electricity price developments in Germany since liberalization
Christian Growitsch, Felix Müsgens
External Publications,
2005
Abstract
Despite the liberalization of energy markets in 1998, household electricity prices in 2004 are nearly the same as 1998, indicating a failure of market restructuring. However, such a general consideration is misleading for two main reasons. Firstly, the price development shows significant differences among the stages of the value chain. Secondly, the underlying cost structure might have changed from 1998 to 2004. While such effects can be expected to level out over time, they can distort the comparison of a small period of observation. For these reasons, we analyzed the different price components at a detailed level, finding a considerable price reduction of about 32% in generation and a much lower reduction of 13% in transmission and distribution tariffs. These decreases have been mostly compensated by a significant increase in taxes and subsidies (+56%).
Read article
Network Access Charges, Vertical Integration, and Property Rights Structure
Christian Growitsch, Thomas Wein
Energy Economics,
No. 2,
2005
Abstract
After the deregulation of the German electricity markets in 1998, the German government opted for a regulatory regime called negotiated third party access, which would be subject to ex post control by the federal cartel office. Network access charges for new competitors are based on contractual arrangements between energy producers and industrial consumers. As the electricity networks are incontestable natural monopolies, the local and regional network operators are able to set (monopolistic) charges at their own discretion, limited only by their concerns over possible interference by the federal cartel office (Bundeskartellamt). In this paper we analyse if there is evidence for varying charging behaviour depending on a supplier`s economic independence (structure of property rights) or its level of vertical integration. For this purpose we hypothesise that incorporated and vertically integrated suppliers set different charges than independent utility companies. Multivariate estimations show a relation between network access charges and the network operator’s economic independence as well as level of vertical integration. On the low voltage level, for an estimated annual consumption of 1700 kW/h, vertically integrated firms set – as predicted by our hypothesis - significantly lower access charges than vertically separated suppliers, whereas incorporated network operators charge significantly higher charges compared to independent suppliers. There is insufficient evidence available to confirm these results for other consumptions or voltage levels.
Read article
Aggressive Orders and the Resiliency of a Limit Order Market
Hans Degryse, Frank de Jong, Maarten Van Ravenswaaij, Gunther Wuyts
Review of Finance,
No. 2,
2005
Abstract
We analyze the resiliency of a pure limit order market by investigating the limit order book (bid and ask prices, spreads, depth and duration), order flow and transaction prices in a window of best limit updates and transactions around aggressive orders (orders that move prices). We find strong persistence in the submission of aggressive orders. Aggressive orders take place when spreads and depths are relatively low, and they induce bid and ask prices to be persistently different after the shock. Depth and spread remain also higher than just before the order, but do return to their initial level within 20 best limit updates after the shock. Relative to the sample average, depths stay around their mean before and after aggressive orders, whereas spreads return to their mean after about twenty best limit updates. The initial price impact of the aggressive order is partly reversed in the subsequent transactions. However, the aggressive order produces a long-term effect as prices show a tendency to return slowly to the price of the aggressive order.
Read article
Evaluation of Further Training Programmes with an Optimal Matching Algorithm
Eva Reinowski, Birgit Schultz, Jürgen Wiemers
Swiss Journal of Economics and Statistics,
2005
Abstract
This paper evaluates the effects of further training on the unemployment duration of different groups of persons representing individual characteristics and some aspects of the economic environment. The Micro Census Saxony enables us to include the employment history as a proxy for unobserved variables and to avoid Ashenfelters Dip. We employ an optimal full matching assignment, which is superior to greedy pair matching in the sense that it avoids the loss of observations due to the design of the algorithm. Overall, we find empirical evidence that participation in further training programmes results in even longer unemployment, with only gradual differences.
Read article
The Role of Regional Knowledge Sources for Innovation – An Empirical Assessment
Michael Fritsch, Viktor Slavtchev
Freiberg Working Papers, Nr. 15-2005,
No. 15,
2005
Abstract
We investigate the contribution of different inputs, particularly different knowledge sources, on regional patenting output in the framework of a knowledge production function. The knowledge sources included are R&D employment, size of public research institutions by field of research (budget), amount of university external research funds from private firms, public departments, German Science Foundation (DFG), and from other sources. The contribution of these knowledge sources is tested systematically on the level of German districts (Kreise) by including the respective information for the particular region and for adjacent regions. One main finding is that the quality of the university research makes some contribution to regional innovation while the mere size of the universities is unimportant. Differences in the effect on innovative output can be found according to academic disciplines and type of university.
Read article
Technology spillovers from external investors in East Germany: no overall effects in favor of domestic firms
Harald Lehmann, Jutta Günther
IWH Discussion Papers,
No. 198,
2004
Abstract
The study deals with the question whether external (foreign and West German) investors in East Germany induce technological spillover effects in favor of domestic firms. It ties in with a number of other econometric spillover studies, especially for transition economies, which show rather mixed and inconclusive results so far. Different from existing spillover analyses, this study allows for a much deeper regional breakdown up to Raumordnungsregionen and uses a branch classification that explicitly considers intermediate and investment good linkages. The regression results show no positive correlation between the presence of external investors and domestic firms’ productivity, no matter which regional breakdown is looked at (East Germany as a whole, federal states, or Raumordnungsregionen). Technology spillovers which may exist in particular cases are obviously not strong enough to increase the domestic firms’ overall productivity.
Read article
The effects of demographic changes on the level and structure of private consumption - a forecast for Germany until 2050 -
Harald Lehmann
IWH Discussion Papers,
No. 195,
2004
Abstract
This thesis analyzes the impact of different demografic scenarios on level and composition of private consumption in Germany. The analysis is based on the current household budget survey (Einkommens- und Verbrauchsstichprobe 1998) whose datas are adapted to the concepts of national accounting. Therefore households have to be defined by demografic aspects to investigate their consumption behavior. In the next step this will be used to forecast the effects of an aging population on private consumption by utilize a shift share analysis. The results lay open that the demografic impact is minor compared to economic factors influencing the composition of private consumption. This holds also in regard to the development of the absolute level of private consumption.
Read article
Flexible utilization of labor strengthens industrial enterprises´ ability to adapt to fluctuations in business - an empirical east-west comparison based on the IAB company panel
Brigitte Loose, Udo Ludwig
Wirtschaft im Wandel,
No. 12,
2004
Abstract
Based on an individual data set, this article investigates the question of which conventional methods and new instruments companies use to adapt to fluctuations in business and what distinguishes these companies from other ones which have not implemented such instruments. In particular, the role of the technical equipment as well as the personnel policy and tariff policy are analyzed. An empirical comparison between the East and West German manufacturing industries demonstrates whether East German firms have competitive advantages. While the technological conditions for firms´ flexibility are somewhat less pronounced in East German, the proportion of “standardized“ and flexible employment is nearly the same in the East-West comparison. Differences exist among small, middle-sized and large firms as well as among types of yield. The weak orientation with respect to agreed wages and hours worked as well as the mainly gratuitous reduction of unpaid overtime which can be implemented over the whole year, prove to be an advantage. The investigation is based on a data set from the IAB company panel of manufacturing industries in 2003.
Read article