Wallace E. Tyner - Academia.edu (original) (raw)
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Universidad Nacional de Educación "Enrique Guzmán y Valle
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Papers by Wallace E. Tyner
Biomass & Bioenergy, 2011
"Indirect land use change for biofuels: Testing predictions and improving analytical methodologie... more "Indirect land use change for biofuels: Testing predictions and improving analytical methodologies" by S. Kim and B. Dale [1], presents a principal inference not supported by its results, that rests on a fundamental conceptual error, and that has no place in the current discussion of biofuels’ climate effects. The paper takes correlation between two variables in a system with many interacting factors to indicate (or contraindicate) causation, and draws a completely incorrect inference from observed sample statistics and their significance levels.► The recent Kim and Dale paper “Indirect land use change…” is wrong. ► The authors’ data (weakly) support a conclusion opposite to their inference. ► The paper misapprehends the relationship of biofuel expansion to land use change. ► It misuses statistical inference calculations and uses basic hypothesis testing incorrectly. ► It profoundly confuses correlation and causation in a multivariate environment.
GCB Bioenergy, 2014
Existing assessments of biomass supply and demand and their impacts face various types of limitat... more Existing assessments of biomass supply and demand and their impacts face various types of limitations and uncertainties, partly due to the type of tools and methods applied (e.g. partial representation of sectors, lack of geographical details, aggregated representation of technologies involved). Improved collaboration between existing modeling approaches may provide new, more comprehensive insights, especially into issues that involve multiple economic sectors, different temporal and spatial scales or various impact categories. Model collaboration consists of aligning and harmonizing input data and scenarios, model comparison and/or model linkage.
American Journal of Agricultural Economics, 1979
ABSTRACT
Land Economics, 1985
In the first half of their book, the authors identify the demand factor within the overall view o... more In the first half of their book, the authors identify the demand factor within the overall view of the energy economy, widen the field of investigation to take in the other major links in the energy chain represented by reserves and production facilities, and analyze demand within the ...
American Journal of Agricultural Economics - AMER J AGR ECON, 2007
Bioenergy Research, 2010
The objective of this research is to evaluate the feasibility and locations of using cellulosic b... more The objective of this research is to evaluate the feasibility and locations of using cellulosic biomass both from crop residues and from dedicated energy crops to supply 200-million-liter-biodiesel plants in France. The estimation of the potential amount of agricultural residue available in 2015 in each region of France is calculated. The residues considered in this study come from cereal straw
Biomass & Bioenergy, 2011
"Indirect land use change for biofuels: Testing predictions and improving analytical methodologie... more "Indirect land use change for biofuels: Testing predictions and improving analytical methodologies" by S. Kim and B. Dale [1], presents a principal inference not supported by its results, that rests on a fundamental conceptual error, and that has no place in the current discussion of biofuels’ climate effects. The paper takes correlation between two variables in a system with many interacting factors to indicate (or contraindicate) causation, and draws a completely incorrect inference from observed sample statistics and their significance levels.► The recent Kim and Dale paper “Indirect land use change…” is wrong. ► The authors’ data (weakly) support a conclusion opposite to their inference. ► The paper misapprehends the relationship of biofuel expansion to land use change. ► It misuses statistical inference calculations and uses basic hypothesis testing incorrectly. ► It profoundly confuses correlation and causation in a multivariate environment.
GCB Bioenergy, 2014
Existing assessments of biomass supply and demand and their impacts face various types of limitat... more Existing assessments of biomass supply and demand and their impacts face various types of limitations and uncertainties, partly due to the type of tools and methods applied (e.g. partial representation of sectors, lack of geographical details, aggregated representation of technologies involved). Improved collaboration between existing modeling approaches may provide new, more comprehensive insights, especially into issues that involve multiple economic sectors, different temporal and spatial scales or various impact categories. Model collaboration consists of aligning and harmonizing input data and scenarios, model comparison and/or model linkage.
American Journal of Agricultural Economics, 1979
ABSTRACT
Land Economics, 1985
In the first half of their book, the authors identify the demand factor within the overall view o... more In the first half of their book, the authors identify the demand factor within the overall view of the energy economy, widen the field of investigation to take in the other major links in the energy chain represented by reserves and production facilities, and analyze demand within the ...
American Journal of Agricultural Economics - AMER J AGR ECON, 2007
Bioenergy Research, 2010
The objective of this research is to evaluate the feasibility and locations of using cellulosic b... more The objective of this research is to evaluate the feasibility and locations of using cellulosic biomass both from crop residues and from dedicated energy crops to supply 200-million-liter-biodiesel plants in France. The estimation of the potential amount of agricultural residue available in 2015 in each region of France is calculated. The residues considered in this study come from cereal straw