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Perspectives on nonparametric and Semiparametric Modeling

Adonis Yatchew

Year: 2008
Volume: Volume 29
Number: Special Issue
DOI: 10.5547/ISSN0195-6574-EJ-Vol29-NoSI-2
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Abstract:
Nonparametric regression techniques hold out the promise of more flexible modeling of data in many areas of physical, biological and social sciences. However, their use is hampered by the "curse of dimensionality" which imposes enormous data requirements as the number of explanatory variables increases. After summarizing two of the most commonly used methods for mitigating the �curse�, this paper outlines a new approach which exploits data on derivatives. In economics, such circumstances arise in the joint estimation of cost and factor demand functions, or when production function data are combined with data on factor prices. The ideas are illustrated using empirical examples from energy economics.



Introduction

Ying fan and Adonis Yatchew

Year: 2016
Volume: Volume 37
Number: China Special Issue
DOI: 10.5547/01956574.37.SI1.yfan
No Abstract



High Shares of Renewable Energy Sources and Electricity Market Reform - Preface

Adonis Yatchew

Year: 2016
Volume: Volume 37
Number: Bollino-Madlener Special Issue
DOI:
No Abstract



Integration of Renewables into the Ontario Electricity System

Brian Rivard and Adonis Yatchew

Year: 2016
Volume: Volume 37
Number: Bollino-Madlener Special Issue
DOI: 10.5547/01956574.37.SI2.briv
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Abstract:
The Ontario electricity industry has a 'hybrid' structure: electricity is bought and sold in a competitive wholesale electricity market while supply mix planning and procurement are conducted through a government agency. Most generation is secured through long-term contracts. Aggressive renewable energy programs have led to rapidly growing renewable capacity, mainly wind generation. Coal-fired generation has been eliminated and electricity sales have dropped. The competitive hourly market price has declined and there is a clear merit-order effect: an increase of wind generation from 500 MW to 1500 MW can be expected to decrease price by 7 CAD/MWh. However, the all-in price, which incorporates contractually guaranteed supply prices, has risen from about 60 to 100 CAD/MWh between 2009 and 2014. Operational and market integration of renewable resources has been achieved relatively smoothly. The procurement process is over-centralized: increased reliance on market discipline and greater separation between governmental policy makers and regulators would enhance both the efficacy and efficiency of decarbonization policies.



Is Productivity Growth in Electricity Distribution Negative? An Empirical Analysis Using Ontario Data

Dimitri Dimitropoulos and Adonis Yatchew

Year: 2017
Volume: Volume 38
Number: Number 2
DOI: 10.5547/01956574.38.2.ddim
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Abstract:
Electricity industries are experiencing upward cost pressures in many parts of the world. This paper focuses on productivity trends in electricity distribution. We apply two methodologies for estimating productivity growth - an index based approach, and an econometric cost based approach - to data on 73 Ontario distributors for the period 2002 to 2012. The resulting productivity growth estimates are approximately -1% per year, suggesting a reversal of the positive estimates that have generally been reported in previous periods. We implement flexible semi-parametric specifications to assess the robustness of these conclusions and discuss the use of such statistical analyses for calibrating productivity and relative efficiency within a price-cap framework.





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