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Jann Lay

Biographic Data

ID3821116
NAMEJann Lay
GIVEN NAMESJann
FAMILY NAMELay
SIGNATURELAY J
AFFILIATIONSGerman Institute for Global and Area Studies
VERIFIEDNo
TOTAL WORKS14
TOTAL CITATIONS123
AUTHOR COUNT14
EDITOR COUNT0
FIRST PUBLICATION YEAR2006
LATEST PUBLICATION YEAR2025
H-INDEX4
  • The poverty and distributional impacts of carbon pricing on households: Evidence from Ghana, Nigeria and Uganda

    Open Access•Sinem H Ayhan, Hannes Greve et al.•ARTICLE•Environment and Development…•2025

    We examine the distributional impact of domestic carbon pricing in three Sub-Saharan African countries. We combine household expenditure surveys and sectoral carbon intensity data derived from a multi-regional input-output model for Ghana, Nigeria and Uganda. Our findings indicate that domestic carbon pricing is progressive in all three countries. This primarily results from higher budget allocations for direct energy consumption in wealthier hou…

  • Africa's Emergent Tech Sector: Characteristics and Development Implications

    Open Access•Jotham Lay, Jann Lay et al.•ARTICLE•Africa Spectrum•2025•References: 22

    This study examines the characteristics of Africa's tech sector and its implications for development. Using a database of technology firms in Africa, we show that start-ups are increasingly attracting funding across Africa, especially in underdeveloped sectors such as finance, retail, and transportation. We then illustrate that African start-ups' digital technologies are often tailored to local contexts to attract, connect, and retain customers. …

  • Smallholder RSPO certification, economic benefits and agrochemical use

    Open Access•Sebastian Renner, Anette Ruml et al.•ARTICLE•Environmental Research Letters•2024

    Sustainability standards, such as the Roundtable for Sustainable Palm Oil (RSPO), can potentially mitigate the trade-offs between economic benefits and environmental harm of oil palm expansion. Using unique primary household and farm level panel data collected from Jambi Province, Indonesia, we first document the differences in agricultural inputs and outputs between certified and non-certified smallholder farmers. Second, we illustrate the poten…

  • Large-scale acquisitions of communal land in the Global South: Assessing the risks and formulating policy recommendations

    Open Access•Jorge A Rincón Barajas, Christoph Kubitza et al.•ARTICLE•Land Use Policy•2024•Cited by: 2•References: 72

    This article conceptualises and empirically assesses the socioeconomic and environmental risks of large-scale land acquisitions (LSLAs) for communal lands in the Global South. These risks include the displacement of local communities due to the insufficient formal recognition of communal land and exclusive and corrupt negotiations with investors who frequently exploit the legal pluralism inherent in these tenure systems. Furthermore, LSLAs often …

  • Large-Scale Agricultural Investments, Employment Opportunities, and Communal Conflict

    Alexander De Juan, L Hoffmann et al.•ARTICLE•The Journal of Politics•2024•References: 9

  • The empirics of and policies for sustainability in global value chains

    Open Access•Jotham Lay, Jann Lay et al.•ARTICLE•World Development•2024

  • How vulnerable are small firms to energy price increases? Evidence from Mexico

    Open Access•Hannes Greve, Jotham Lay et al.•ARTICLE•Environment and Development…•2023

    The vulnerability of small firms to price shocks may partly explain why fossil fuel subsidy removals in developing countries are so difficult to implement. This paper analyzes the effects of fuel and electricity price increases on profits of micro- and small-sized enterprises in Mexico. Using representative cross-sectional data, simulations of profit losses hint at potentially large short-term effects. First-order profit losses of a 1 per cent pr…

  • Smallholders in agro-industrial production: Lessons for rural development from a comparative analysis of Ghana’s and Indonesia’s oil palm sectors

    Open Access•Anette Ruml, Daniel Chrisendo et al.•ARTICLE•Land Use Policy•2022•Cited by: 1•References: 49

    By successfully including smallholders, the oil palm boom in Southeast Asia has contributed significantly to rural economic development and poverty alleviation, notwithstanding its huge environmental costs. Oil palm production in other world regions is currently picking up, including in Africa. Yet it is uncertain whether the positive socioeconomic impacts from Southeast Asia can be replicated elsewhere. Little development gain may thus accompany…

  • Large-scale land acquisitions, agricultural trade, and zoonotic diseases: Overlooked links

    Open Access•Markus Giger, Sandra Eckert et al.•ARTICLE•One Earth•2021

  • Determinants of foreign land acquisitions in low- and middle-income countries

    Jotham Lay, Jann Lay et al.•ARTICLE•Journal of Economic Geography•2017•Cited by: 5•References: 16

    This article analyses the determinants of growing demand for agricultural land in developing countries. We propose some determinants that are specific to foreign acquisitions of agricultural land as a subset of agricultural foreign direct investment (FDI) and empirically examine the corresponding locational choice. Using a gravity model and a data set on land acquisitions worldwide, we find that the determinants partly overlap with those for othe…

  • Creating a public tool to assess and promote transparency in global land deals: The experience of the Land Matrix

    Ward Anseeuw, Jotham Lay et al.•ARTICLE•The Journal of Peasant Studies•2013•Cited by: 44•References: 6

    The Beta version of the Land Matrix (Land Matrix 2012) was launched in April 2012 as \na tool to promote public participation in building a constantly evolving database on \nlarge-scale land deals, and making the data visible and understandable. The aim of \nthe Land Matrix partnership is to promote transparency and open data in decisionmaking \nover land and investment, as a step towards greater accountability. Since its \nlaunch, the Land Matri…

  • Ethnicity and party preference in sub-Saharan Africa

    Matthias Basedau, Gero Erdmann et al.•ARTICLE•Democratization•2011•Cited by: 35•References: 24

    Recent research has questioned the notion that ethnicity is the main determinant of party preference in sub-Saharan Africa. Drawing on data from representative survey polls in eight anglophone and francophone sub-Saharan countries, multinomial and binary logit regressions confirm that ethnicity counts but does not explain party preference as a whole. More importantly we find that the relevance of ethnicity varies substantially from country to cou…

  • Resource Curse or Rentier Peace? The Ambiguous Effects of Oil Wealth and Oil Dependence on Violent Conflict

    Open Access•Matthias Basedau, Jotham Lay et al.•ARTICLE•Journal of Peace Research•2009•Cited by: 36•References: 25

    The 'resource curse' hypothesis claims that abundance in natural resources, particularly oil, encourages especially civil war. Natural resources provide both motive and opportunity for conflict and create indirect institutional and economic causes of instability. Contrarily, the theory of the rentier state - largely neglected in the study of peace and war in this respect - suggests that regimes use revenue from abundant resources to buy off peace…

  • Structural Change And Poverty Reduction In Brazil: The Impact Of The Doha Round

    Jotham Lay, Jann Lay et al.•BOOK•2006

    Over the medium time horizon, skill upgrading, differentials in sectoral technological progress, and migration of labor out of farming activities are some of the major structural adjustment factors shaping the evolution of an economy and its connected poverty trends. The main focus of the authors is understanding, for the case of Brazil, how a trade shock interacts with these structural forces and ascertaining whether it enhances or hinders mediu…

  • Creating a public tool to assess and promote transparency in global land deals: The experience of the Land Matrix

    Ward Anseeuw, Jotham Lay et al.•ARTICLE•The Journal of Peasant Studies•2013•Cited by: 44•References: 6

    The Beta version of the Land Matrix (Land Matrix 2012) was launched in April 2012 as \na tool to promote public participation in building a constantly evolving database on \nlarge-scale land deals, and making the data visible and understandable. The aim of \nthe Land Matrix partnership is to promote transparency and open data in decisionmaking \nover land and investment, as a step towards greater accountability. Since its \nlaunch, the Land Matri…

  • Resource Curse or Rentier Peace? The Ambiguous Effects of Oil Wealth and Oil Dependence on Violent Conflict

    Open Access•Matthias Basedau, Jotham Lay et al.•ARTICLE•Journal of Peace Research•2009•Cited by: 36•References: 25

    The 'resource curse' hypothesis claims that abundance in natural resources, particularly oil, encourages especially civil war. Natural resources provide both motive and opportunity for conflict and create indirect institutional and economic causes of instability. Contrarily, the theory of the rentier state - largely neglected in the study of peace and war in this respect - suggests that regimes use revenue from abundant resources to buy off peace…

  • Ethnicity and party preference in sub-Saharan Africa

    Matthias Basedau, Gero Erdmann et al.•ARTICLE•Democratization•2011•Cited by: 35•References: 24

    Recent research has questioned the notion that ethnicity is the main determinant of party preference in sub-Saharan Africa. Drawing on data from representative survey polls in eight anglophone and francophone sub-Saharan countries, multinomial and binary logit regressions confirm that ethnicity counts but does not explain party preference as a whole. More importantly we find that the relevance of ethnicity varies substantially from country to cou…

  • Determinants of foreign land acquisitions in low- and middle-income countries

    Jotham Lay, Jann Lay et al.•ARTICLE•Journal of Economic Geography•2017•Cited by: 5•References: 16

    This article analyses the determinants of growing demand for agricultural land in developing countries. We propose some determinants that are specific to foreign acquisitions of agricultural land as a subset of agricultural foreign direct investment (FDI) and empirically examine the corresponding locational choice. Using a gravity model and a data set on land acquisitions worldwide, we find that the determinants partly overlap with those for othe…

  • Large-scale acquisitions of communal land in the Global South: Assessing the risks and formulating policy recommendations

    Open Access•Jorge A Rincón Barajas, Christoph Kubitza et al.•ARTICLE•Land Use Policy•2024•Cited by: 2•References: 72

    This article conceptualises and empirically assesses the socioeconomic and environmental risks of large-scale land acquisitions (LSLAs) for communal lands in the Global South. These risks include the displacement of local communities due to the insufficient formal recognition of communal land and exclusive and corrupt negotiations with investors who frequently exploit the legal pluralism inherent in these tenure systems. Furthermore, LSLAs often …

  • Smallholders in agro-industrial production: Lessons for rural development from a comparative analysis of Ghana’s and Indonesia’s oil palm sectors

    Open Access•Anette Ruml, Daniel Chrisendo et al.•ARTICLE•Land Use Policy•2022•Cited by: 1•References: 49

    By successfully including smallholders, the oil palm boom in Southeast Asia has contributed significantly to rural economic development and poverty alleviation, notwithstanding its huge environmental costs. Oil palm production in other world regions is currently picking up, including in Africa. Yet it is uncertain whether the positive socioeconomic impacts from Southeast Asia can be replicated elsewhere. Little development gain may thus accompany…

  • Structural Change And Poverty Reduction In Brazil: The Impact Of The Doha Round

    Jotham Lay, Jann Lay et al.•BOOK•2006

    Over the medium time horizon, skill upgrading, differentials in sectoral technological progress, and migration of labor out of farming activities are some of the major structural adjustment factors shaping the evolution of an economy and its connected poverty trends. The main focus of the authors is understanding, for the case of Brazil, how a trade shock interacts with these structural forces and ascertaining whether it enhances or hinders mediu…

  • Resource Curse or Rentier Peace? The Ambiguous Effects of Oil Wealth and Oil Dependence on Violent Conflict

    Open Access•Matthias Basedau, Jotham Lay et al.•ARTICLE•Journal of Peace Research•2009•Cited by: 36•References: 25

    The 'resource curse' hypothesis claims that abundance in natural resources, particularly oil, encourages especially civil war. Natural resources provide both motive and opportunity for conflict and create indirect institutional and economic causes of instability. Contrarily, the theory of the rentier state - largely neglected in the study of peace and war in this respect - suggests that regimes use revenue from abundant resources to buy off peace…

  • Ethnicity and party preference in sub-Saharan Africa

    Matthias Basedau, Gero Erdmann et al.•ARTICLE•Democratization•2011•Cited by: 35•References: 24

    Recent research has questioned the notion that ethnicity is the main determinant of party preference in sub-Saharan Africa. Drawing on data from representative survey polls in eight anglophone and francophone sub-Saharan countries, multinomial and binary logit regressions confirm that ethnicity counts but does not explain party preference as a whole. More importantly we find that the relevance of ethnicity varies substantially from country to cou…

  • Creating a public tool to assess and promote transparency in global land deals: The experience of the Land Matrix

    Ward Anseeuw, Jotham Lay et al.•ARTICLE•The Journal of Peasant Studies•2013•Cited by: 44•References: 6

    The Beta version of the Land Matrix (Land Matrix 2012) was launched in April 2012 as \na tool to promote public participation in building a constantly evolving database on \nlarge-scale land deals, and making the data visible and understandable. The aim of \nthe Land Matrix partnership is to promote transparency and open data in decisionmaking \nover land and investment, as a step towards greater accountability. Since its \nlaunch, the Land Matri…

  • Determinants of foreign land acquisitions in low- and middle-income countries

    Jotham Lay, Jann Lay et al.•ARTICLE•Journal of Economic Geography•2017•Cited by: 5•References: 16

    This article analyses the determinants of growing demand for agricultural land in developing countries. We propose some determinants that are specific to foreign acquisitions of agricultural land as a subset of agricultural foreign direct investment (FDI) and empirically examine the corresponding locational choice. Using a gravity model and a data set on land acquisitions worldwide, we find that the determinants partly overlap with those for othe…

  • Large-scale land acquisitions, agricultural trade, and zoonotic diseases: Overlooked links

    Open Access•Markus Giger, Sandra Eckert et al.•ARTICLE•One Earth•2021

  • Smallholders in agro-industrial production: Lessons for rural development from a comparative analysis of Ghana’s and Indonesia’s oil palm sectors

    Open Access•Anette Ruml, Daniel Chrisendo et al.•ARTICLE•Land Use Policy•2022•Cited by: 1•References: 49

    By successfully including smallholders, the oil palm boom in Southeast Asia has contributed significantly to rural economic development and poverty alleviation, notwithstanding its huge environmental costs. Oil palm production in other world regions is currently picking up, including in Africa. Yet it is uncertain whether the positive socioeconomic impacts from Southeast Asia can be replicated elsewhere. Little development gain may thus accompany…

  • How vulnerable are small firms to energy price increases? Evidence from Mexico

    Open Access•Hannes Greve, Jotham Lay et al.•ARTICLE•Environment and Development…•2023

    The vulnerability of small firms to price shocks may partly explain why fossil fuel subsidy removals in developing countries are so difficult to implement. This paper analyzes the effects of fuel and electricity price increases on profits of micro- and small-sized enterprises in Mexico. Using representative cross-sectional data, simulations of profit losses hint at potentially large short-term effects. First-order profit losses of a 1 per cent pr…

  • Smallholder RSPO certification, economic benefits and agrochemical use

    Open Access•Sebastian Renner, Anette Ruml et al.•ARTICLE•Environmental Research Letters•2024

    Sustainability standards, such as the Roundtable for Sustainable Palm Oil (RSPO), can potentially mitigate the trade-offs between economic benefits and environmental harm of oil palm expansion. Using unique primary household and farm level panel data collected from Jambi Province, Indonesia, we first document the differences in agricultural inputs and outputs between certified and non-certified smallholder farmers. Second, we illustrate the poten…

  • Large-scale acquisitions of communal land in the Global South: Assessing the risks and formulating policy recommendations

    Open Access•Jorge A Rincón Barajas, Christoph Kubitza et al.•ARTICLE•Land Use Policy•2024•Cited by: 2•References: 72

    This article conceptualises and empirically assesses the socioeconomic and environmental risks of large-scale land acquisitions (LSLAs) for communal lands in the Global South. These risks include the displacement of local communities due to the insufficient formal recognition of communal land and exclusive and corrupt negotiations with investors who frequently exploit the legal pluralism inherent in these tenure systems. Furthermore, LSLAs often …

  • Large-Scale Agricultural Investments, Employment Opportunities, and Communal Conflict

    Alexander De Juan, L Hoffmann et al.•ARTICLE•The Journal of Politics•2024•References: 9

  • The empirics of and policies for sustainability in global value chains

    Open Access•Jotham Lay, Jann Lay et al.•ARTICLE•World Development•2024

  • The poverty and distributional impacts of carbon pricing on households: Evidence from Ghana, Nigeria and Uganda

    Open Access•Sinem H Ayhan, Hannes Greve et al.•ARTICLE•Environment and Development…•2025

    We examine the distributional impact of domestic carbon pricing in three Sub-Saharan African countries. We combine household expenditure surveys and sectoral carbon intensity data derived from a multi-regional input-output model for Ghana, Nigeria and Uganda. Our findings indicate that domestic carbon pricing is progressive in all three countries. This primarily results from higher budget allocations for direct energy consumption in wealthier hou…

  • Africa's Emergent Tech Sector: Characteristics and Development Implications

    Open Access•Jotham Lay, Jann Lay et al.•ARTICLE•Africa Spectrum•2025•References: 22

    This study examines the characteristics of Africa's tech sector and its implications for development. Using a database of technology firms in Africa, we show that start-ups are increasingly attracting funding across Africa, especially in underdeveloped sectors such as finance, retail, and transportation. We then illustrate that African start-ups' digital technologies are often tailored to local contexts to attract, connect, and retain customers. …

Economics (12 works) · Business (7 works) · Geography (7 works) · Natural resource economics (6 works) · Political science (6 works) · Agriculture (5 works) · Economic growth (5 works) · Agricultural economics (4 works) · Agriculture, Land Use, Rural Development (4 works) · Cartography (3 works)

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