Thomas Kopp
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The relation between contract type and market power: Evidence from a high-value crop in India Open
Theoretical considerations suggest that production contracts systematically lead to higher market concentration and increase contracting firms' ability to mark down farm gate prices compared to marketing contracts. Existing research on con…
View article: Agricultural marketing channels and market prices: Evidence from high-value crop producers in India
Agricultural marketing channels and market prices: Evidence from high-value crop producers in India Open
Smallholders in developing and emerging economies face significant challenges when marketing fruits and vegetables. Over the past decades, governments have increased efforts to provide smallholders with marketing outlets, including contrac…
View article: Labor Displacement in Agriculture: Evidence from Oil Palm Expansion in Indonesia
Labor Displacement in Agriculture: Evidence from Oil Palm Expansion in Indonesia Open
We analyze the labor market effects of oil palm cultivation among smallholder farmers in Indonesia. Oil palm requires less labor per unit of land than alternative crops, especially less female labor. Microlevel data and nationally represen…
When switching costs cause market power: Rubber processing in Indonesia Open
Suppliers of agricultural output incur switching costs (SCs) when choosing new buyers, allowing buyers to exercise oligopsonistic market power, as SCs help buyers to mark down prices for incumbent suppliers. This article conceptualizes the…
Perishability and market power in Nepalese food crop production Open
This study provides empirical evidence for the relation between perishability in vertically coordinated supply chains and the market power exercised over smallholders in Nepal. Using survey data from small‐scale farms of tomatoes, ginger, …
Sugar market policies in the EU and international sugar trade Open
In the EU, the 2017/18 sugar marketing year (MY) was the first with no production quota and most of the price support gone. The Uruguay round restrictions on sugar exports were also not binding anymore, making the EU a net exporter. In MY2…
Don't Bite the Hand That Feeds You: Food Pantries and Food Retailer Profitability Open
This paper examines the extent to which the presence of food pantries diverts food sales from retail grocers. Hunger-relief programs, such as food services provided through food banks, serve as emergency assistance to meet households' temp…
Price Transmission in International Crude Palm Oil Markets: The Effects of Export Tax of Indonesia Open
Over the past decade, there have been fluctuations in the global price of CPO.These variations in global CPO price are likely to affect the local CPO price as well.To overcome this, the Indonesian government has implemented an export tax o…
Farmers, Traders, and Processors: Estimating the Welfare Loss from Double Marginalization for the Indonesian Rubber Sector Open
Reducing buyer market power over agricultural suppliers is a key strategy to improve rural livelihoods in emerging economies. This paper focuses on implications of failure of a supply chain to coordinate vertically for farm incomes, with s…
Can the Tripartite Rubber Council manipulate international rubber prices? Open
In contrast to the trend of a generally increasing liberalization of markets, agriculture remains one of the most protected sectors. In globally distributed production networks the effects of sector specific policies may spill over to othe…
Modelling Social Evolutionary Processes and Peer Effects in Agricultural Trade Networks: the Rubber Value Chain in Indonesia Open
Understanding market participants' channel choices is important to policy makers because it yields information on which channels are effective in transmitting information. These channel choices are the result of a recursive process of soci…
Modelling Social Evolutionary Processes and Peer Effects in Agricultural\n Trade Networks: the Rubber Value Chain in Indonesia Open
Understanding market participants' channel choices is important to policy\nmakers because it yields information on which channels are effective in\ntransmitting information. These channel choices are the result of a recursive\nprocess of s…
Identifying Influential Traders by Agent Based Modelling Open
Understanding individual traders' channel choices is important to policy makers because it yields information on which channels are effective in transmitting information. Since trading networks are characterised by feedback mechanisms alon…
Traders’ market power along Indonesian rubber value chains Open
Purpose While traders of agricultural products are known to often exercise market power, this power has rarely been quantified for developing countries. The paper aims to discuss this issue. Design/methodology/approach In order to derive a…
Bertrand Competition in Oligopsonistic Market Structures - the Case of the Indonesian Rubber Processing Sector Open
Violations of the law of one price (LOP) appear to be more the rule than the exception in various markets.This paper models the interface between agricultural supply and processing to explain violations of the LOP due to a fixed cost compo…
Do Mature Economies Grow Exponentially? Open
Most models that try to explain economic growth indicate exponential growth paths. In recent years, however, a lively discussion has emerged considering the validity of this notion. In the empirical literature dealing with drivers of econo…