Jaghdani, Tinoush Jamali

[["dc.contributor.author","Dalheimer, Bernhard"],["dc.contributor.author","Brümmer, Bernhard"],["dc.contributor.author","Jaghdani, Tinoush Jamali"],["dc.date.accessioned","2018-02-05T15:40:44Z"],["dc.date.available","2018-02-05T15:40:44Z"],["dc.date.issued","2017"],["dc.description.abstract","While export restrictive policy has long been associated with increasing food price volatility, it has received minimal attention in the empirical literature compared to other potential drivers of international food price fluctuations. This paper aims at closing this gap by firstly quantifying the relevant policies in an indicator of export restrictive policy. Subsequently, the effects of that are tested on estimated realized and GARCH volatility in VAR-X models where various wheat price volatilities are allowed to be endogenously determined. In a second step, the impacts of export controls during times of market turmoil are assessed in asymmetric volatility models. This strategy succinctly reveals the effects of export controls along the policy, frequency, country and time dimensions providing a detailed set of evidence. It is found that, most pronounced effects on wheat price volatility stem from long-term quotas. Similarly, longer term prohibitions of some countries have impacted wheat price fluctuation as well. On the contrary, long term tax strategies are shown to not significantly impact wheat price volatility. However, during times of market turmoil all three considered export restrictions have particularly contributed to wheat price volatility. Strengthened and more binding WTO regulation could have led to significantly less food price volatility, especially in times of food price crisis, such as recently experienced during the 2007/08 and 2010/11 episodes."],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/11969"],["dc.language.iso","en"],["dc.notes.preprint","yes"],["dc.notes.status","final"],["dc.relation.conference","57. Jahrestagung der Gesellschaft für Wirtschafts- und Sozialwissenschaften des Landbaues e.V., \"Agrar- und Ernährungswirtschaft zwischen Ressourceneffizienz und gesellschaftlichen Erwartungen\""],["dc.relation.eventend","15. September 2017"],["dc.relation.eventlocation","Freising"],["dc.relation.eventstart","13. September 2017"],["dc.relation.iserratumof","yes"],["dc.title","Impacts of Export Restrictions on Food Price Volatility: Evidence from VAR-X and EGARCH-X Models"],["dc.type","conference_paper"],["dc.type.internalPublication","unknown"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","375"],["dc.bibliographiccitation.issue","3"],["dc.bibliographiccitation.journal","Irrigation and Drainage"],["dc.bibliographiccitation.lastpage","385"],["dc.bibliographiccitation.volume","61"],["dc.contributor.author","Jaghdani, Tinoush Jamali"],["dc.contributor.author","Brümmer, Bernhard"],["dc.contributor.author","Barkmann, Jan"],["dc.date.accessioned","2018-01-08T15:14:58Z"],["dc.date.available","2018-01-08T15:14:58Z"],["dc.date.issued","2012"],["dc.description.abstract","Physical availability and adequate distribution of irrigation water are two globally pressing resource management issues. In the long run, the design of irrigation infrastructure should be based on the economic value of irrigation water, taking into account a full analysis of all associated costs and benefits. In the absence of water markets, non-market valuation methods need to be employed to assess the economic value of irrigation water. A multitude of valuation methods are available, which often differ substantially in their results. We compare three different methods using primary data collected from the Qazvin irrigation network in Iran. We compare economic values based on contingent valuation (197 rial m‾3), the value of marginal product (430/476 rial m‾3 depending on functional form assumptions), and change in net rent (1080 rial m‾3). The hypothetical nature of the contingent valuation and the presence of strategic responses may have resulted in understatements of the true water values. Thus, a stochastic frontier analysis was used to correct for undervaluation bias, which is estimated at 272 rial m‾3. Our results suggest that actual water prices fall substantially short of the estimated economic values in the Qazvin irrigation network: higher water prices would hence improve the allocation of water."],["dc.identifier.doi","10.1002/ird.683"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/11566"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.title","Comparison of methods for the valuation of irrigation water: case study from Qazvin, Iran"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dspace.entity.type","Publication"]]

[["dc.contributor.author","Jaghdani, Tinoush Jamali"],["dc.contributor.author","Brümmer, Bernhard"],["dc.date.accessioned","2018-02-06T11:26:52Z"],["dc.date.available","2018-02-06T11:26:52Z"],["dc.date.issued","2011"],["dc.description.abstract","Water markets have been proposed as a tool for dealing with water scarcity and have been justified by emphasising their efficiency. Market-based allocation systems have the potential to ensure that the scarce water will flow to the user who earns the highest marginal value from the water. However, the number of recorded instances where water supply problems are solved by market-based systems remains limited. This study attempts to identify the decisive factors that motivate farmers� participation in spot water markets in the Rafsanjan aquifer in southeastern Iran. The precipitation level is very low in this region (90 mm annually), and the main source of water is groundwater. A two-stage random sampling was carried out in a field study from November 2008 - February 2009. In this survey, information was collected regarding groundwater quality and the annual production and cost of the pistachio gardens, as well as detailed technical and economic information about the pump or well. Additionally, the garden structure, land-water ownership, and socioeconomic characteristics of the farming household or landlord were included in the survey. A Logit model for the binary participation variable is used to test the factors affecting farmers� decisions to buy groundwater from neighbours who share the same pump. Both farmer characteristics and technical variables are considered as explanatory variables. The results show that the technical variables contribute substantially to the participation decision. E.g., a decrease in water quality, an increase in the age of the garden, and an increase in the size of the water quota reduce the probability of participation. In contrast, more scattered plots, a higher water flow level of pump, and a deeper well increase the probability of participation in spot water markets. Additionally, the application of the spatial Moran�s I test on the residuals of regression shows no spatial effect inside the model. This study shows that water scarcity and improvement of water quality increase the probability of participation in water markets. Finally, the results suggest that in this area the participation in water markets is motivated more by profit increasing factors than by farmer characters."],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/11980"],["dc.language.iso","en"],["dc.notes.preprint","yes"],["dc.notes.status","final"],["dc.relation.conference","Tropentag 2011, Conference on International Research on Food Security, Natural Resource Management and Rural Development"],["dc.relation.eventend","October 7, 2011"],["dc.relation.eventlocation","Bonn"],["dc.relation.eventstart","October 5, 2011"],["dc.relation.iserratumof","yes"],["dc.title","Participation of Tree-crop Farmers in Spot Water Markets in Semiarid Areas: An Example from Iran"],["dc.type","conference_paper"],["dc.type.internalPublication","unknown"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","15"],["dc.bibliographiccitation.lastpage","28"],["dc.contributor.author","Brümmer, Bernhard"],["dc.contributor.author","Korn, Olaf"],["dc.contributor.author","Schlüßler, Kristina"],["dc.contributor.author","Jaghdani, Tinoush Jamali"],["dc.contributor.author","Saucedo, Alberto"],["dc.contributor.editor","Garrido, Alberto"],["dc.contributor.editor","Brümmer, Bernhard"],["dc.contributor.editor","M’Barek, Robert"],["dc.contributor.editor","Meuwissen, Miranda"],["dc.contributor.editor","Morales-Opazo, Cristian"],["dc.date.accessioned","2018-02-05T14:34:24Z"],["dc.date.available","2018-02-05T14:34:24Z"],["dc.date.issued","2016"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/11966"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.publisher","Routledge"],["dc.publisher.place","London and New York"],["dc.relation.isbn","978-1-138-93741-3"],["dc.relation.ispartof","Agricultural Markets Instability: Revisiting the Recent Food Crises"],["dc.title","Volatility in the after-crisis period. A literature review of recent empirical research"],["dc.type","book_chapter"],["dc.type.internalPublication","unknown"],["dspace.entity.type","Publication"]]

[["dc.contributor.author","Brümmer, Bernhard"],["dc.contributor.author","Korn, Olaf"],["dc.contributor.author","Schlüßler, Kristina"],["dc.contributor.author","Jaghdani, Tinoush Jamali"],["dc.contributor.author","Saucedo, Alberto"],["dc.date.accessioned","2018-02-12T10:48:49Z"],["dc.date.available","2018-02-12T10:48:49Z"],["dc.date.issued","2013"],["dc.description.abstract","Executive summary 1. Price volatility has been a key concern for policy makers and scientists. Agricultural and food price level developments in the 2007/2008 food price crisis have triggered a substantial response in the published literature, although the perceived trend towards higher price volatility can only be robustly confirmed for cereals. 2. Volatility is unobservable and hence needs to be estimated. Since volatility refers to price changes which are unexpected, estimates of price volatility require modelling the price levels, too. Many conceptual choices have to be made in this exercise, with corresponding consequences for the interpretation of the resulting price volatility measure. This is not always as clearly documented as it should ideally be the case. 3. Empirical studies are often based either on futures or on spot prices; studies which look at the price volatility spillovers between the two price series are much less frequent. Price volatility is transmitted quickly between these markets only for sufficiently liquid futures and spot markets. For some policy concerns, the focus should be more on spot markets; for others, futures markets are the relevant scale. 4. Methods for price volatility are under continuous refinement. For agricultural markets, GARCH models are the main working tool. With increasing availability of high frequency trading data, realised volatility measures are used often in analyses for futures markets. 5. Policy measures can exert drastic influence on price volatility patterns. This holds obviously for direct price controls and similar agricultural price policies but also for export and import policies. In recent years, bioenergy policies are adding a new demand component which often is not adjusted in light of price changes, thus adding to price volatility. 6. Fundamental factors on supply and demand side explain a major part of price volatility in the past. They will most likely continue to be the most important factors for new episodes of inflated price volatility. However, the example of investment in agricultural productivity growth makes clear that fundamentals have also a role to play in curbing future price volatility. With sufficient productivity growth, price volatility due to bad harvests could be effectively mitigated. 7. Carry-over stocks normally play an important role for intertemporal price smoothing. If stocks are low (usually measured via stocks-to-use ratios), markets tend to show elevated price volatility in response to new information. Imprecise and vague knowledge about the magnitude of available carry-over stocks exacerbate the situation. 8. Price volatility is usually not affecting a single market but spillovers abound. For agricultural and food prices, input markets and fossil fuel markets are key volatility transmission channels. Among agricultural markets, substitution possibilities determine volatility linkages. Spillovers from other non-agricultural commodity markets are less important. 9. Speculation is seen as a driver of volatility, too. However, the establishment of causal links in this area is extremely challenging. Problems exist in the clear definition of what speculation exactly is (is the farmer who does not make use of a functioning futures market for hedging a speculator?), and how to exactly measure it (are all non-commercial investors in a given futures market speculating?). Furthermore, causality is generally difficult to assess in non-experimental settings. Most of the existing results (e.g., Granger causality type analyses) are merely assessing the predictive power of the history of one price series for the future development of another price series."],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/12152"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.publisher","ULYSSES project, EU 7th Framework Programme"],["dc.relation","ULYSSES"],["dc.title","Volatility in the after crisis period – A literature review of recent empirical research"],["dc.type","working_paper"],["dc.type.internalPublication","unknown"],["dspace.entity.type","Publication"]]

[["dc.contributor.author","Jaghdani, Tinoush Jamali"],["dc.contributor.author","Brümmer, Bernhard"],["dc.date.accessioned","2018-02-06T11:18:42Z"],["dc.date.available","2018-02-06T11:18:42Z"],["dc.date.issued","2011"],["dc.description.abstract","Depletion of groundwater resources is an international problem, and groundwater is probably the world’s most extracted raw material. The agriculture sector is one of the biggest users of groundwater resources for irrigation activities and plays an important role in the depletion of these resources. Up to now, the main focus of economic studies on groundwater resources has been on comparing two regimes of quantity based management: optimal control and competitive pumping. As a result, the estimation of the demand function for groundwater resources is the first step towards any policy recommendations in this field of research. However, only scarce attention has been given to empirical studies of the demand structure of groundwater resources that use of econometrics and consider the quality of the resources and the spatial effect of groundwater users on each other in the context of a single aquifer. Therefore, an empirical estimation of the demand function for individual users that takes into account water quality and spatial effects of the individual users enhances further economic analysis and results in better policy recommendations. In this study, we have analysed the economic factors and the groundwater quality as influencing variables on the derived demand function for irrigation water in the pistachio production of the Rafsanjan aquifer in the southeastern part of Iran. The field study was conducted from November 2008 - February 2009. A translog cost function has been applied for the estimation of the derived demand function for groundwater in pistachio production and its shadow price. Spatial econometrics has been applied to correct the results. Results show that demand for groundwater is inelastic for changes in pumping costs. It also shows that spatial correlation affects the estimated demand function."],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/11979"],["dc.language.iso","en"],["dc.notes.preprint","yes"],["dc.notes.status","final"],["dc.relation.conference","Inaugural Conference on Iran’s Economy"],["dc.relation.eventend","December 8, 2011"],["dc.relation.eventlocation","London"],["dc.relation.eventstart","December 7, 2011"],["dc.relation.iserratumof","yes"],["dc.title","Demand for Irrigation Water from Depleting Groundwater Resources in Pistachio Production, Case Study from Iran"],["dc.type","conference_paper"],["dc.type.internalPublication","unknown"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","599"],["dc.bibliographiccitation.journal","Water Policy"],["dc.bibliographiccitation.lastpage","618"],["dc.contributor.author","Jaghdani, Tinoush Jamali"],["dc.contributor.author","Brümmer, Bernhard"],["dc.date.accessioned","2017-11-28T10:03:36Z"],["dc.date.available","2017-11-28T10:03:36Z"],["dc.date.issued","2015"],["dc.description.abstract","Market-based water allocation systems have the potential to ensure that scarce water will flow to the user who earns the highest marginal value from that water. However, the number of recorded instances where water supply problems are solved by market-based systems remains limited. This study attempts to identify the decisive factors that motivate farmers’ participation in informal spot water markets in the Rafsanjan aquifer in south-eastern Iran. A two-stage random sampling was carried out in a field survey from November 2008 to February 2009. A logit model is used to test the factors affecting farmers’ decisions to buy groundwater from neighbours who share the same pump. The results show that the technological variables contribute substantially to the participation decision. For example, a decrease in water quality, an increase in the age of the garden, and an increase in the size of the water quota reduce the probability of participation. In contrast, more scattered plots, a higher water flow level from pumping, and a deeper well increase the probability of participation in water markets. Finally, the results suggest that in this area, the participation in water markets is motivated more by profit increasing factors than by farmer socioeconomic characteristics."],["dc.identifier.doi","10.2166/wp.2015.093"],["dc.identifier.fs","622617"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/10616"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.relation.eissn","1996-9759"],["dc.relation.issn","1366-7017"],["dc.title","Determinants of water purchases by pistachio producers in an informal groundwater market: a case study from Iran"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","unknown"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","29"],["dc.bibliographiccitation.lastpage","58"],["dc.contributor.author","Brümmer, Bernhard"],["dc.contributor.author","Dönmez, Ayça"],["dc.contributor.author","Jaghdani, Tinoush Jamali"],["dc.contributor.author","Korn, Olaf"],["dc.contributor.author","Magrini, Emiliano"],["dc.contributor.author","Schlüßler, Kristina"],["dc.contributor.editor","Garrido, Alberto"],["dc.contributor.editor","Brümmer, Bernhard"],["dc.contributor.editor","M’Barek, Robert"],["dc.contributor.editor","Meuwissen, Miranda"],["dc.contributor.editor","Morales-Opazo, Cristian"],["dc.date.accessioned","2018-02-05T15:01:20Z"],["dc.date.available","2018-02-05T15:01:20Z"],["dc.date.issued","2016"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/11967"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.publisher","Routledge"],["dc.publisher.place","London and New York"],["dc.relation.isbn","978-1-138-93741-3"],["dc.relation.ispartof","Agricultural Markets Instability: Revisiting the Recent Food Crises"],["dc.title","Has agricultural price volatility increased since 2007?"],["dc.type","book_chapter"],["dc.type.internalPublication","unknown"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","944"],["dc.bibliographiccitation.issue","6"],["dc.bibliographiccitation.journal","International Journal of Water Resources Development"],["dc.bibliographiccitation.lastpage","960"],["dc.bibliographiccitation.volume","32"],["dc.contributor.author","Jaghdani, Tinoush Jamali"],["dc.contributor.author","Brümmer, Bernhard"],["dc.date.accessioned","2018-01-02T17:25:44Z"],["dc.date.available","2018-01-02T17:25:44Z"],["dc.date.issued","2016"],["dc.description.abstract","This study highlights the methodological challenges in determining the value of water in informal water markets. As the decision to participate in water markets is unlikely to be random, self-selectivity is an important issue for an unbiased estimation of the participating farmers’ revealed willingness to pay. The relevance of these issues is illustrated for an informal irrigation water market in Iran. A two-stage random sampling was carried out in pistachio-growing farms which are irrigated by water from the Rafsanjan aquifer in Iran during 2008–2009. A Heckman sample selection model shows that the real willingness to pay can be less than the observed prices in an informal water market."],["dc.identifier.doi","10.1080/07900627.2015.1133405"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/11538"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.title","Determinants of willingness to pay for groundwater: insights from informal water markets in Rafsanjan, Iran"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dspace.entity.type","Publication"]]

[["dc.contributor.author","Brümmer, Bernhard"],["dc.contributor.author","Korn, Olaf"],["dc.contributor.author","Schlüßler, Kristina"],["dc.contributor.author","Jaghdani, Tinoush Jamali"],["dc.date.accessioned","2018-04-12T15:49:04Z"],["dc.date.available","2018-04-12T15:49:04Z"],["dc.date.issued","2014"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/13229"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.publisher","ULYSSES project, EU 7th Framework Programme"],["dc.relation","ULYSSES"],["dc.title","Volatility analysis: causation impacts in retrospect (2007-2011) and preparing for the future"],["dc.type","working_paper"],["dc.type.internalPublication","unknown"],["dspace.entity.type","Publication"]]