Abdoul Sam - Academia.edu (original) (raw)

Papers by Abdoul Sam

Research paper thumbnail of Country of Origin Advertising and U.S. Wine Imports

The objective of this paper is to investigate the impact of media advertising on the US consumpti... more The objective of this paper is to investigate the impact of media advertising on the US consumption of imported wine. A panel data of seven countries and twelve years from 1994-2005 is used to estimate the demand function for US wine imports. Our empirical analysis reveals evidence of strong price and advertising effects of domestic and imported wines on imported

Research paper thumbnail of Parental Decision-Making and Intra-Household Resource Allocation

Research paper thumbnail of How do Voluntary Pollution Reduction Programs (VPRs) Work? An Empirical Study of Links between VPRs, Environmental Management, and Environmental Performance

EPA-sponsored voluntary pollution reduction programs (VPR) have gained increased prominence in U.... more EPA-sponsored voluntary pollution reduction programs (VPR) have gained increased prominence in U.S. environmental policy. However, as commitments to these programs are not enforceable by design, the empirical literature has mostly focused on studying the motives for their adoption and their efficacy in curbing pollution. This paper seeks (i) to shed light on the bi-directional links between participation in a VPR

Research paper thumbnail of Does the insurance effect of public and private transfers favor financial deepening? Evidence from rural Nicaragua

Review of Development Finance, 2012

The literature suggests Conditional Cash Transfers (CCT) and remittances may protect poor househo... more The literature suggests Conditional Cash Transfers (CCT) and remittances may protect poor households from income risk. We present a theoretical framework that explores how this ‘insurance’ effect can change households’ decision to apply for a loan via changes in credit demand and supply. Empirical evidence from poor rural households in Nicaragua shows CCTs did not affect loan requests while remittances

Research paper thumbnail of Nonparametric regression under alternative data environments

Statistics & Probability Letters, 2006

This manuscript proposes a nonparametric regression estimator which can accommodate two empirical... more This manuscript proposes a nonparametric regression estimator which can accommodate two empirically relevant data environments. The first data environment assumes that at least one of the explanatory variables is discrete. In such an environment a “cell” approach which ...

Research paper thumbnail of Nonparametric Estimation of the Short Rate Diffusion Process from a Panel of Yields

Journal of Financial and Quantitative Analysis, 2009

ABSTRACT In this paper, we propose a nonparametric estimator of the short rate diffusion process ... more ABSTRACT In this paper, we propose a nonparametric estimator of the short rate diffusion process using obser- vations of a panel of yields. The proposed estimator can greatly reduce the bias of the nonparametric estimator proposed in Stanton (1997) that uses a single time series of short rate observations. Simulations confirm that the new method,significantly attenuates the spurious nonlinearity of

Research paper thumbnail of Do voluntary pollution reduction programs (VPRs) spur or deter environmental innovation? Evidence from 33/50

Journal of Environmental Economics and Management, 2013

ABSTRACT In the context of the EPA’'s 33/50 program, we study whether a VPR can prompt fi... more ABSTRACT In the context of the EPA’'s 33/50 program, we study whether a VPR can prompt firms to develop new environmental technologies that yield future emission reduction benefits. Because pollutant reductions generally require costly reformulations of products and/or production processes, environmental over-compliance – induced by a VPR – may potentially spur environmental innovation that can reduce these costs. Conversely, a VPR may induce a participating firm to divert resources from environmental research to environmental monitoring and compliance activities that yield short-term benefits in reduced emissions. We find evidence that higher rates of 33/50 program participation are associated with significant reductions in the number of successful environmental patent applications four to six years after the program ended; these results suggest a negative relationship between the 33/50 program and longer-run environmental innovation.

Research paper thumbnail of Impact of Adoption of Improved Groundnut Varieties on Factor Demand and Productivity in Uganda

2011 Annual Meeting, July 24- …, 2011

Downloadable! The study analyzed the impact of adoption of improved groundnut varieties on farm i... more Downloadable! The study analyzed the impact of adoption of improved groundnut varieties on farm inputs demand and productivity using instrumental variables approach. The data was collected from a simple random sample of 161 groundnut farmers in Eastern Uganda. Econometric ...

Research paper thumbnail of Voluntary Pollution Abatement: Testing Alternative Theories

2003 Annual meeting, July 27-30, Montreal, …, 2003

We broaden the existing empirical literature on environmental regulation and voluntary pollution ... more We broaden the existing empirical literature on environmental regulation and voluntary pollution abatement programs by testing the effects of implicit boycott threats and a firm's participation in a partnership program on its subsequent regulatory oversight using EPA's 33/50 ...

Research paper thumbnail of Voluntary pollution reduction programs, environmental management, and environmental performance: an empirical study

Land Economics, 2009

ABSTRACT. This paper examines, empirically, the mechanism by which a voluntary pollution reductio... more ABSTRACT. This paper examines, empirically, the mechanism by which a voluntary pollution reduction program (VPR) achieves pollution reductions. We find that participation in the 33/50 program, the US Environmental Protection Agency's first VPR, spurred the adoption of ...

Research paper thumbnail of Country of origin advertising and US demand of imported wine: an empirical analysis

Applied Economics Letters, 2012

We investigate the impact of media advertising on the US consumption of imported wine. Panel data... more We investigate the impact of media advertising on the US consumption of imported wine. Panel data from six countries over 15 years (1994–2008) are used to estimate an aggregate demand function for US wine imports. Our empirical analysis reveals evidence of important effects of advertising of domestic and imported wines on imported quantities; the advertising of imported wines significantly increases

Research paper thumbnail of Organic and conventional milk purchase behaviors in Central Ohio

Agribusiness, 2011

The authors use weekly milk scanner data from six stores of a national supermarket chain to inves... more The authors use weekly milk scanner data from six stores of a national supermarket chain to investigate empirically the purchasing patterns of suburban and inner-city residents for conventional and organic milk. They disaggregate conventional milk products into four categories ...

Research paper thumbnail of Impact of Conditional Cash Transfers and Remittances on Credit Market Outcomes in Rural Nicaragua

… Meeting, July 26-28 …, 2009

Copyright 2009 by Emilio Hernandez, Abdoul Sam, Claudio Gonzalez-Vega and Joyce Chen. All rights ... more Copyright 2009 by Emilio Hernandez, Abdoul Sam, Claudio Gonzalez-Vega and Joyce Chen. All rights reserved. Readers may make verbatim copies of this document for non-commercial purposes by any means, provided that this copyright notice appears on all such copies.

Research paper thumbnail of Country of Origin Advertising and U.S. Wine Imports

The objective of this paper is to investigate the impact of media advertising on the US consumpti... more The objective of this paper is to investigate the impact of media advertising on the US consumption of imported wine. A panel data of seven countries and twelve years from 1994-2005 is used to estimate the demand function for US wine imports. Our empirical analysis reveals evidence of strong price and advertising effects of domestic and imported wines on imported

Research paper thumbnail of Parental Decision-Making and Intra-Household Resource Allocation

Research paper thumbnail of How do Voluntary Pollution Reduction Programs (VPRs) Work? An Empirical Study of Links between VPRs, Environmental Management, and Environmental Performance

EPA-sponsored voluntary pollution reduction programs (VPR) have gained increased prominence in U.... more EPA-sponsored voluntary pollution reduction programs (VPR) have gained increased prominence in U.S. environmental policy. However, as commitments to these programs are not enforceable by design, the empirical literature has mostly focused on studying the motives for their adoption and their efficacy in curbing pollution. This paper seeks (i) to shed light on the bi-directional links between participation in a VPR

Research paper thumbnail of Does the insurance effect of public and private transfers favor financial deepening? Evidence from rural Nicaragua

Review of Development Finance, 2012

The literature suggests Conditional Cash Transfers (CCT) and remittances may protect poor househo... more The literature suggests Conditional Cash Transfers (CCT) and remittances may protect poor households from income risk. We present a theoretical framework that explores how this ‘insurance’ effect can change households’ decision to apply for a loan via changes in credit demand and supply. Empirical evidence from poor rural households in Nicaragua shows CCTs did not affect loan requests while remittances

Research paper thumbnail of Nonparametric regression under alternative data environments

Statistics & Probability Letters, 2006

This manuscript proposes a nonparametric regression estimator which can accommodate two empirical... more This manuscript proposes a nonparametric regression estimator which can accommodate two empirically relevant data environments. The first data environment assumes that at least one of the explanatory variables is discrete. In such an environment a “cell” approach which ...

Research paper thumbnail of Nonparametric Estimation of the Short Rate Diffusion Process from a Panel of Yields

Journal of Financial and Quantitative Analysis, 2009

ABSTRACT In this paper, we propose a nonparametric estimator of the short rate diffusion process ... more ABSTRACT In this paper, we propose a nonparametric estimator of the short rate diffusion process using obser- vations of a panel of yields. The proposed estimator can greatly reduce the bias of the nonparametric estimator proposed in Stanton (1997) that uses a single time series of short rate observations. Simulations confirm that the new method,significantly attenuates the spurious nonlinearity of

Research paper thumbnail of Do voluntary pollution reduction programs (VPRs) spur or deter environmental innovation? Evidence from 33/50

Journal of Environmental Economics and Management, 2013

ABSTRACT In the context of the EPA’'s 33/50 program, we study whether a VPR can prompt fi... more ABSTRACT In the context of the EPA’'s 33/50 program, we study whether a VPR can prompt firms to develop new environmental technologies that yield future emission reduction benefits. Because pollutant reductions generally require costly reformulations of products and/or production processes, environmental over-compliance – induced by a VPR – may potentially spur environmental innovation that can reduce these costs. Conversely, a VPR may induce a participating firm to divert resources from environmental research to environmental monitoring and compliance activities that yield short-term benefits in reduced emissions. We find evidence that higher rates of 33/50 program participation are associated with significant reductions in the number of successful environmental patent applications four to six years after the program ended; these results suggest a negative relationship between the 33/50 program and longer-run environmental innovation.

Research paper thumbnail of Impact of Adoption of Improved Groundnut Varieties on Factor Demand and Productivity in Uganda

2011 Annual Meeting, July 24- …, 2011

Downloadable! The study analyzed the impact of adoption of improved groundnut varieties on farm i... more Downloadable! The study analyzed the impact of adoption of improved groundnut varieties on farm inputs demand and productivity using instrumental variables approach. The data was collected from a simple random sample of 161 groundnut farmers in Eastern Uganda. Econometric ...

Research paper thumbnail of Voluntary Pollution Abatement: Testing Alternative Theories

2003 Annual meeting, July 27-30, Montreal, …, 2003

We broaden the existing empirical literature on environmental regulation and voluntary pollution ... more We broaden the existing empirical literature on environmental regulation and voluntary pollution abatement programs by testing the effects of implicit boycott threats and a firm's participation in a partnership program on its subsequent regulatory oversight using EPA's 33/50 ...

Research paper thumbnail of Voluntary pollution reduction programs, environmental management, and environmental performance: an empirical study

Land Economics, 2009

ABSTRACT. This paper examines, empirically, the mechanism by which a voluntary pollution reductio... more ABSTRACT. This paper examines, empirically, the mechanism by which a voluntary pollution reduction program (VPR) achieves pollution reductions. We find that participation in the 33/50 program, the US Environmental Protection Agency's first VPR, spurred the adoption of ...

Research paper thumbnail of Country of origin advertising and US demand of imported wine: an empirical analysis

Applied Economics Letters, 2012

We investigate the impact of media advertising on the US consumption of imported wine. Panel data... more We investigate the impact of media advertising on the US consumption of imported wine. Panel data from six countries over 15 years (1994–2008) are used to estimate an aggregate demand function for US wine imports. Our empirical analysis reveals evidence of important effects of advertising of domestic and imported wines on imported quantities; the advertising of imported wines significantly increases

Research paper thumbnail of Organic and conventional milk purchase behaviors in Central Ohio

Agribusiness, 2011

The authors use weekly milk scanner data from six stores of a national supermarket chain to inves... more The authors use weekly milk scanner data from six stores of a national supermarket chain to investigate empirically the purchasing patterns of suburban and inner-city residents for conventional and organic milk. They disaggregate conventional milk products into four categories ...

Research paper thumbnail of Impact of Conditional Cash Transfers and Remittances on Credit Market Outcomes in Rural Nicaragua

… Meeting, July 26-28 …, 2009

Copyright 2009 by Emilio Hernandez, Abdoul Sam, Claudio Gonzalez-Vega and Joyce Chen. All rights ... more Copyright 2009 by Emilio Hernandez, Abdoul Sam, Claudio Gonzalez-Vega and Joyce Chen. All rights reserved. Readers may make verbatim copies of this document for non-commercial purposes by any means, provided that this copyright notice appears on all such copies.