challenges of conducting contingent valuation studies in developing countries we review the experiences and challenges that researchers can face when conducting contingent valuation studies in developing countries we discuss these challenges based on our own experiences of conducting field contingent valuation studies about genetically modified rice in five developing countries that represent different regions of the world and diverse cultures we also base our discussion on results from a survey we conducted of agricultural and applied economists regarding their own experiences the issues covered include the selection and training of local personnel the recruitment of participants sampling challenges participants compensation survey methods and implementation elicitation methods the literacy rate of the population and security safety issues in developing countries we also discuss the implications of our findings to other well established stated preference methods such as choice experiments

does income inequality harm the environment empirical evidence from the united states abstract this study revisits the growth inequality environment nexus in the context of country specific time series data the short and long run effects of income inequality economic growth and energy consumption on co2 emissions in the u s are examined using the autoregressive distributed lag ardl approach we find that more equitable distribution of income in the u s results in better environmental quality in the short and long run it is also found that in both the short and long run economic growth has a beneficial effect on environmental quality whereas energy consumption has a detrimental effect on the environment

responsible property investing in canada factoring both environmental and social impacts in the canadian real estate market institutional investors and corporations increasingly recognize that extra financial determinants of business performance can both create value and uncover significant risks within a business or investment portfolio for companies that invest in develop own or operate commercial real estate assets this awareness of extra financial impacts has led to a significant interest in what has been called responsible property investment rpi within the field of rpi green real estate real estate investment and management that seeks to reduce the environmental impacts of building construction and operations has begun to receive attention this attention has been extended over the past decade to community property development projects where both social and environmental considerations related not only to the building but also the project site and surrounding community are integrated into management and investment decisions some examples of these projects include affordable and workforce housing urban revitalization and brownfield redevelopment more social focussed issues such as labour and workplace considerations are also key components of responsible property investing yet to date labour issues have received little attention in the rpi literature and workplace considerations are reflected indirectly through environmental considerations in the green building literature this paper explores responsible real estate investment in canada by taking an integrated approach in examining both environmental and social factors and their potential impact on such investments a series of semi structured interviews are conducted with key stakeholders in canada to gain insight into how using environmental and social factors may influence long term risk and financial returns in real estate investment in canada with particular emphasis on institutional investors engaged in these practices data is used to analyse the impact that esg considerations have on financial performance of these assets jantzi sustainalytics esg ratings are used along with the stock price changes of fourteen real estate companies and reits to interrogate this question

integrating technology traits and producer heterogeneity a mixed multinomial model of genetically modified corn adoption this article proposes a model of technology adoption that integrates demand for individual traits of new technologies with the potential for heterogeneity based on farm and farmer characteristics the model is applied to recent genetically modified corn adoption data from minnesota and wisconsin farmers using a mixed multinomial logit mmnl model to estimate the effects of traits and farm and farmer characteristics on adoption outcomes this approach allows explicit recovery of estimates of farmers shadow prices for individual technology traits results show the importance of producer and regional heterogeneity in preferences for seed traits

payments for pioneers revisiting the role of external rewards for sustainable innovation under heterogeneous motivations abstract acknowledging the diversity of preferences goals and motivations of individuals is key to promote the effectiveness of incentive based conservation interventions this paper analyses the heterogeneity of motivations to adopt silvopastoral practices a social ecological innovation for soil conservation and carbon emission reduction we use q methodology to identify smallholders views with regard to these practices in a community in the forest frontier in chiapas mexico the analysis uncovers three main perspectives self sufficient pioneers environmentally conscious followers and payment dependent conservatives we discuss these perspectives around three topics smallholders predisposition to adopt silvopastoral practices their views about needing external payments to sustain their livelihood and the diffusion of innovative sustainable practices we relate these perspectives with livelihood characteristics and with observed adoption levels under a pilot programme to promote silvopasture our findings suggest that incentives other than payments may be more appropriate for those more likely to adopt and that payments could encourage rent seeking strategies and not necessarily promote permanent behavioural change we suggest ways for designing more effective and adaptive environmental conservation programmes to foster adoption and continuation of social ecological innovations

genetically modified crops corporate pricing strategies and farmers adoption the case of bt cotton in argentina this article analyzes adoption and impacts of bt cotton in argentina against the background of monopoly pricing based on survey data it is shown that the technology significantly reduces insecticide applications and increases yields however these advantages are curbed by the high price charged for genetically modified seeds using the contingent valuation method it is shown that farmers average willingness to pay is less than half the actual technology price a lower price would not only increase benefits for growers but could also multiply company profits thus resulting in a pareto improvement implications of the sub optimal pricing strategy are discussed recently genetically modified gm crops have brought about important changes in the global market for agricultural technologies especially seeds prospects of high economic returns and tightened intellectual property rights iprs have provided new incentives for the private sector to invest in crop improvement and extend its business to nontraditional markets the increasingly proprietary nature of seed technologies has implications for farmers adoption and benefit distribution private innovators endowed with a patent on a technology will attempt to capture the gains from their innovation through monopoly pricing moschini and lapan recent studies have looked into the partitioning of welfare created by gm crops among agricultural producers consumers and innovating input firms e g moschini lapan and sobolevsky falckzepeda traxler and nelson in these studies however the market price of the technology is

future inequality in co2 emissions and the impact of abatement proposals this paper analyzes future carbon emissions inequality using a group decomposition of the gini index business as usual projections to the year 2100 for 135 countries show inequality in per capita emissions declines slowly next the impact on emissions levels and inequality of the kyoto protocol and other abatement proposals for annex ii countries in 2010 are measured with a focus on the gap narrowing and reranking effects substantial reranking of per capita emissions between annex ii and non annex ii countries will not occur unless the former reduce their emissions by at least 50 versus 1990 levels and the latter continue growing unabated

globalisation growth and convergence this paper devoted to the study of globalisation analyses two distinct but closely related issues first it aims at evaluating disparities in the degree of globalisation observed in a sample of 101 countries over the period 1970 2005 second the paper tries to shed some light to the much debated issue of whether globalisation affects economic growth and in so doing whether convergence in globalisation brings about convergence in per capita income the results obtained are both encouraging on the one side as it is shown that there has been a clear process of globalisation convergence on the other the paper concludes that globalisation has been one of the main drivers of economic growth thus fostering convergence in per capita income

carbon inequality at the sub national scale a case study of provincial level inequality in co2 emissions in china 1997 2007 abstract this study asks whether sub national inequalities in carbon dioxide co2 emissions mirror international patterns in carbon inequality using the case study of china several studies have examined global level carbon inequality however such approaches have not been used on a sub national scale this study examines inter provincial inequality in co2 emissions within china using common measures of inequality coefficient of variation gini index theil index to analyze provincial level data derived from the ipcc reference approach for the years 1997 2007 it decomposes co2 emissions inequality into its inter regional and intra regional components patterns of per capita co2 emissions inequality in china appear superficially similar to though slightly lower than per capita income inequality however decomposing these inequalities reveals different patterns while inter provincial income inequality is highly regional in character inter provincial co2 emissions inequality is primarily intra regional while apparently similar global patterns in co2 emissions are not mirrored at the sub national scale

international inequalities in per capita co2 emissions a decomposition methodology by kaya factors in this paper we provide a methodology for decomposing international inequalities in per capita co2 emissions into kaya multiplicative factors and two interaction terms we use the theil index of inequality and show that this decomposition methodology can be extended for analyzing between and within group inequality components we can thus analyze the factors behind inequalities in per capita co2 emissions across countries between groups of countries and within groups of countries the empirical illustration for international data suggests some points firstly international inequality in per capita co2 emissions is mainly attributable to inequalities in per capita income levels which helps to explain its recent reduction while differences in carbon intensity of energy and energy intensity have made a less significant contribution this result is strongly influenced by the performance of china and india secondly the between group inequality component which is the biggest component is also largely explained by the income factor thirdly the within group inequality component increased slightly during the period something mainly due to the change in the income factor and the interaction terms in a few regions

distributional aspects of emissions in climate change integrated assessment models the recent failure of copenhagen negotiations shows that concrete actions are needed to create the conditions for a consensus over global emission reduction policies a wide coalition of countries in international climate change agreements could be facilitated by the perceived fairness of rich and poor countries of the abatement sharing at international level in this paper i use two popular climate change integrated assessment models to investigate the path and decompose components and sources of future inequality in the emissions distribution results prove to be consistent with previous empirical studies and robust to model comparison and show that gaps in gdp across world regions will still play a crucial role in explaining different countries contributions to global warming

political internalization of economic externalities and environmental policy abstract this paper derives the characteristics of endogenous environmental policy in a common agency model of politics and proceeds to show that competition between lobby groups is an important source of internalization of economic externalities our analysis generalizes bhagwati s principle of targeting to the case of distorted political markets moreover we show that the politically optimal structure of environmental taxes incorporates a pigouvian adjustment however since lobby groups care about the distribution of income as well as about efficiency the equilibrium structure of taxes differs considerably from the pigouvian rule

a conceptual framework of adoption of an agricultural innovation abstract in this paper we present a conceptual framework of individual farmers decisions on adoption of a new innovation using the example of a new crop species this framework overcomes the shortcomings of a number of previous studies it represents the adoption of an innovation as a dynamic decision problem spanning at least several years the model allows for generation of potentially valuable information from trialing the innovation the value of such trials is due to development of skills e g in agronomic management of a crop as well as reduction in uncertainty about the innovation s long term profitability the framework also includes the farmer s personal perceptions managerial abilities and risk preferences in order to properly represent the adoption decision process the influences of socio demographic factors within the framework are discussed

decomposing inequality in co2 emissions the role of primary energy carriers and economic sectors emission inequality across countries and the contribution of the energy mix and the sectoral composition of a country s energy use are of central importance to the climate debate we analyze the evolution of inequality in global co2 per capita emissions using both historical data on energy related co2 emissions and future emission scenarios generated with the integrated assessment model remind within our sample of 90 countries the results indicate that the gini index declined from about 0 6 in 1971 to slightly above 0 4 in 2008 a decomposition of the gini index of total emissions into primary energy carriers indicates that this reduction is mainly attributed to declining shares of emissions from coal peat and oil in total emissions and decreasing emission inequality within all fossil primary energy sources from the perspective of economic sectors the decline in overall inequality is almost entirely due to a decline of the contribution of emissions from manufacturing construction our analysis also suggests that an equally spread emission reduction from any one source would not have a major impact on overall emission inequality the analysis of future scenario data indicates that climate policy reduces absolute emission inequality while inducing drastic progressive emission reductions in all regions

geographical spread of global emissions within country inequalities are large and increasing abstract in spite of the extensive literature on greenhouse gas emission inequalities at the world wide level most of the evidence so far has been based on country level data however the within country dimension matters for both the implementation and the policy formation of climate policies as a preliminary step towards a better understanding of within country inequalities this paper measures their extent for the two major greenhouse gases co2 and ch4 over the 1970 2008 period using theil index decompositions we show that within country inequalities account for the bulk of global inequality and tend to increase over the sample period in contrast with diminishing between country inequalities including differences across sectors reveals that between sector inequalities matter more than between country inequalities and between sector inequalities become the dominant source of global inequality at the end of the sample period in the co2 case finally estimated social tensions arising from the disconnection between emissions and future damages turn out to be increasing as soon as within country disparities are taken into account these orders of magnitude should be kept in mind while discussing the efficiency and fairness of alternative paths in combating global warming

demographic influences on willingness to pay for cold tolerance technology new technologies in agriculture have the potential to increase production levels reduce risk and improve profits for farm operators however in order for this to take place the technologies must appeal to producers creating enough interest that they decide to invest in them gauging the level of interest in a technology and the types of producers who will be interested in trying it are important steps in technology development cereal crops such as wheat are important to agriculture in canada in terms of both acreage and revenue researchers in canada are currently attempting to develop more cold tolerant cereal crops to reduce the risk of frost damage and increase the area available to produce these crops a producer survey including questions on past adoption behavior attitudinal characteristics and demographics as well as a set of dichotomous choice questions on new varieties was conducted and analyzed using a regression and willingness to pay calculations demographics were the focus during these activities it was determined that producers from areas experiencing frost regularly with high incomes and large land bases had a higher propensity to adopt and higher willingness to pay for this technology

the impact of income components on the distribution of family incomes attempts have recently been made to assign inequality contributions to various components of income this paper discusses the issues involved in such assignments and highlights the problems that follow from having a number of possible decomposition rules u s data on the distribution of family incomes are used to examine the relative influence of these income components and to evaluate empirically the performance of different decomposition rules a wide range of inequality contributions can be obtained even when restricted to only naturally derived decomposition rules some of the results are plainly absurd and serve to warn against the indiscriminate use of decomposition formulae without first investigating their properties

inequality in co2 emissions across countries and its relationship with income inequality a distributive approach this paper analyses the inequality in co2 emissions across countries and groups of countries and the relationship of this inequality with income inequality across countries for the period 1971 1999 the research employs the tools that are usually applied in income distribution analysis the methodology used here gives qualitative and quantitative information on some of the features of the inequalities across countries that are considered most relevant for the design and discussion of policies aimed at mitigating climate change the paper studies the relationship between co2 emissions and gdp and shows that income inequality across countries has been followed by an important inequality in the distribution of emissions this inequality has diminished mildly although the inequality in emissions across countries ordered in the increasing value of income inequality between rich and poor countries has diminished less than the simple inequality in emissions lastly the paper shows that the inequality in co2 emissions is mostly explained by the inequality between groups with different per capita income level the importance of the inequality within groups of similar per capita income is much lower and has diminished during the period especially in the low middle income group

stochastic convergence in per capita co2 emissions an approach from nonlinear stationarity analysis abstract this paper studies stochastic convergence of per capita co 2 emissions in 28 oecd countries for the 1901 2009 period the analysis is carried out at two aggregation levels first for the whole set of countries joint analysis and then separately for developed and developing states group analysis a powerful time series methodology adapted to a nonlinear framework that allows for quadratic trends with possibly smooth transition between regimes is applied this approach provides more robust conclusions in convergence path analysis enabling a robust detection of the presence and if so the number of changes in the level and or slope of the trend of the series b inferences on stationarity of relative per capita co 2 emissions conditionally on the presence of breaks and smooth transitions between regimes and c estimation of change locations in the convergence paths finally as stochastic convergence is attained when both stationarity around a trend and convergence simultaneously hold the linear approach proposed by tomljanovich and vogelsang 2002 is extended in order to allow for more general quadratic models overall joint analysis finds some evidence of stochastic convergence in per capita co 2 emissions some dispersion in terms of convergence is detected by the group analysis particularly among developed countries this is in accordance with per capita gdp not being the sole determinant of convergence in emissions with factors like search for more efficient technologies fossil fuel substitution innovation and possibly industry outsourcing also having a crucial role

doing well by doing good green office buildings this paper provides the first credible evidence on the economic value of the certification of green buildings in the commercial sector value derived from impersonal market transactions rather than engineering estimates we match publicly available information on the addresses of energy star and leed rated office buildings to a commercial data source detailing the characteristics of u s office buildings and their rental rates we analyze the micro data on 694 certified green buildings and on 7489 other office buildings located within a quarter mile of the certified buildings we find systematic evidence that rents for green offices are about two percent higher than rents for comparable buildings located nearby effective rents i e rents adjusted for the occupancy levels in office buildings are about six percent higher in green buildings than in comparable office buildings nearby at prevailing capitalization rates conversion of the average non green building to an equivalent green building would add more than 5 million in market value these results are robust to the statistical models employed

farmers preferences for crop variety traits lessons for on farm conservation and technology adoption although in situ conservation is increasingly considered an efficient way of conserving plant genetic resources little is known about the incentives and constraints that govern conservation decisions among small farm holders in developing countries using a choice experiment approach we investigated ethiopian farmers crop variety preferences estimated the mean willingness to pay for each crop variety attribute and identified household specific and institutional factors that governed the preferences we found that environmental adaptability and yield stability are important attributes for farmers choice of crop varieties farmers are willing to forego some extra income or yield to obtain a more stable and environmentally adaptable crop variety among other things household resource endowments particularly land holdings and livestock ownership years of farming experience and contact with extension services are the major factors causing household heterogeneity of crop variety preferences based on our experimental results we derived important policy implications for on farm conservation breeding priority setting and improved variety adoption in ethiopia c 2010 elsevier b v all rights reserved less

valuing genetic resources in peasant economies the case of hairless creole pigs in yucatan abstract we report the results of a choice experiment study to model preferences over a selection of breed traits of creole pigs the study was conducted amongst households of backyard producers and small farmers rearing this local breed in yucatan mexico hypothetical choice data were collected to estimate the preference of households over alternative pigs profiles whose attributes distinguish creole pigs from the potentially more productive yet less adapted exotic breeds currently threatening to severely displace this locally adapted animal genetic resource angr the observed choices are employed to estimate a series of random utility models whose results are first tested for preference equality between households and small farmers then endogenous segmentation is allowed within households by means of latent class models stated preference based estimates are found to be of the same magnitude as revealed preference producers costs as a consequence the method is deemed to be appropriate for the valuation of non market functions in production estimates conditional on household characteristics are then presented and discussed

international equity and differentiation in global warming policy ne of the major obstacles to reaching a comprehensive agreement on global warming is the setting of greenhouse gas emission reduction targets for individual countries long standing tensions between industrialized and developing countries have raised the issue of equity in burden sharing moreover individual industrialized nations have pleaded special circumstances and have sought differentiation in their obligations this paper analyzes alternative rules for distributing tradable carbon dioxide emissions permits a non linear programming model which distinguishes between allocation based and outcome based rules is used to analyze the relative welfare outcomes the model is applied to the world body of nations and yields several important policy implications

the willingness to adopt agro ecological innovations application of choice modelling to caribbean banana planters this paper proposes an ex ante evaluation of the willingness to adopt agro ecological innovations aimed at reducing pesticide use for banana production in the french west indies four innovative systems including intercropping improved fallow and new pest tolerant varieties are proposed to a sample of 607 planters with innovation and policy attributes calibrated from a bio economic farm model the model interacts technological and economic innovation attributes with farmer individual factors and allows for a dual source of unobserved heterogeneity we estimate a system of random coefficient logit models to obtain marginal values of innovation traits that can be useful for targeting farm types with appropriate innovations and designing policies for securing agricultural revenue

carbon dioxide emission and income a temporal analysis of cross country distributional patterns the existence of a cointegrating relationship between income and co2 emission for individual country groups suggests existence of a corresponding relationship between the inter country disparities in the levels of income and co2 emission this paper explores the relationship between the patterns of cross country distribution of income and co2 emission and temporal shifts in such a relationship this paper also examines how the mean level of per capita co2 emission and its distributional inequality are related to the corresponding mean income level and the distributional inequality of income the analysis is based on a cross country panel data set at the level of country group environmental quality demanded is treated as a private good and not as a public good as done in most other studies the technique of lorenz and specific concentration curve analysis are used as the basic analytical framework to argue that a measure of relative distributional inequality of income should be used as an explanatory variable in the environmental kuznets curve ekc relationship along with the mean income level in the empirical exercise johansen s cointegration analysis technique is used to explore existence of statistically significant cointegrating vector s relating mean level of emission and specific concentration ratio scr of emission to mean income level and lorenz ratio lr of income the empirical results confirm that the pattern of cross country income distribution has significant effect on the mean level of emission for all the country groups considered

valuing indigenous cattle breeds in kenya an empirical comparison of stated and revealed preference value estimates abstract in this study we compare revealed and stated preference approaches to value traits of cattle in kenya the premise is that much can be learnt about non market values of indigenous animal genetic resources angr from the use of multi attribute stated preference methods if these compare well with revealed preference results the objective is to investigate the performance of choice experiments ces in maasai cattle trading by conducting an external test of preference consistency we compare value estimates for cattle attributes from ces data with those from hedonic analysis of actual transactions by the same population of traders in the same markets and over the same period if ces perform well they can be used to investigate values of those genetically determined livestock traits currently not prominent in pastoralists populations but desirable candidates for breeding or conservation programmes e g disease resistance the results indicate that ce estimates pass the external test and appear to be adequately precise in estimating values for cattle traits that are relevant in market transactions for maasai traders accounting for taste and variance heterogeneity does not change this conclusion ces may therefore be a promising tool for valuing phenotypic traits expressed by indigenous angr

spatially uneven development and low carbon transitions insights from urban and regional planning the ageing of existing energy system infrastructure the threat of climate change and uncertainty in the movement of energy prices have resulted in a widespread agreement on the need for a transition to a low carbon energy system yet the nature of this transition i e what when how and where and its socio economic outcomes at different scales are not well understood the interdependence of the energy sector and economic growth has been mostly studied at the national level via some general equilibrium or econometric models whilst sub national studies at community or urban levels mostly focus on the governance of transitions hence we suggest that a regional perspective to energy policy and research promises to integrate these two approaches by providing a more robust and comprehensive understanding of the implications of low carbon transitions as well as contributing to the development of more effective policies by building on recent ideas on geographical aspects of energy transitions this article offers insights on the changing relationship between the spatial organisation of economic activities and energy systems and identifies tools and methods from urban and regional planning to help with the delivery of efficient and equitable policy outcomes

cotton farmers willingness to pay for pest management services in northern benin this study was carried out to assess cotton farmers willingness to pay wtp for pest management services in northern benin targeted staggered control tsc has been introduced to reduce pesticide use in cotton cropping and generate an estimated benefit of fcfa48 800 74 40 per cotton hectare accruing from increased productivity and reduced pesticide cost however tsc application requires extra time for pest identification and scouting and its adoption remains low due to the lack of funding to boost farmers awareness and cover training costs an interval regression model was used to analyze responses to a double bounded contingent valuation survey with data collected from 300 cotton farmers the results showed that 87 3 of cotton farmers were willing to pay for tsc services annual wtp per cotton hectare was estimated at fcfa16 962 25 80 revealing an existing demand for tsc adoption respondents wtp was driven by farm and socio economic characteristics financial mechanisms managed by farmers could thus potentially foster technology adoption and in turn generate economic and environmental benefits

the economics of green building we analyze the economics of green building finding that recent increases in the supply of green buildings and the volatility in prop erty markets have not affected the returns to green buildings we then analyze a large cross section of office buildings demonstrating that eco nomic returns to energy efficient buildings are substantial finally we relate the economic premiums for green buildings to their relative effi ciency in energy use the attributes rated for thermal efficiency as well as sustainability contribute to premiums in rents and asset values among green buildings increased energy efficiency is fully capitalized into rents and asset values

structural change and convergence of energy intensity across oecd countries 1970 2005 abstract this paper uses new and unique data derived from a consistent framework of national accounts to compute and evaluate energy intensity developments across 18 oecd countries and 50 sectors over the period 1970 2005 we find that across countries energy intensity levels tend to decrease in most manufacturing sectors in the service sector energy intensity decreases at a relatively slow rate with diverse trends across sub sectors a decomposition analysis reveals that changes in the sectoral composition of the economy explain a considerable and increasing part of aggregate energy intensity dynamics a convergence analysis reveals that only after 1995 cross country variation in aggregate energy intensity levels clearly tends to decrease driven by a strong and robust trend break in manufacturing and enhanced convergence in services moreover we find evidence for the hypothesis that across sectors lagging countries are catching up with leading countries with rates of convergence that are on average higher in services than in manufacturing aggregate convergence patterns are almost exclusively caused by convergence of within sector energy intensity levels and not by convergence of the sectoral composition of economies

explanatory factors of co2 per capita emission inequality in the european union the design of european mitigation policies requires a detailed examination of the factors explaining the unequal emissions in the different countries this research analyzes the evolution of inequality in co2 emissions per capita in the european union eu 27 in the period 1990 2009 and its explanatory factors for this purpose we decompose the theil index of inequality into the contributions of the different kaya factors the decomposition is also applied to the inequality between and within groups of countries north europe south europe and east europe the analysis shows an important reduction in inequality to a large extent due to the smaller differences between groups and because of the lower contribution of the energy intensity factor the importance of the gdp per capita factor increases and becomes the main explanatory factor however within the different groups of countries the carbonization index appears to be the most relevant factor in explaining inequalities the policy implications of the results are discussed

utilizing conjoint analysis to design modern crop varieties empirical example for groundnut in niger abstract preferences for monetary and non monetary plant traits influence modern crop variety adoption decisions of farmers to enhance adoption probability of modern crop varieties it is necessary to identify and focus research on traits that significantly contribute to utility while de emphasizing insignificant plant attributes this paper illustrates the potential for applying conjoint analysis to aid the design and targeting of client responsive modern crop varieties farmers ranked eight orthogonally derived plant trait combinations used in an illustrative example utilities were estimated using the choice probability based method of ordered probit results showed that conjoint analysis can differentiate significant and non significant traits of modern crop varieties the usefulness of applying conjoint analysis over identifiable disaggregated groups of a sample was also evident future application of conjoint analysis to the design and targeting of modern crop varieties should carefully consider sample composition and size to permit the estimation of relevant sub models for desired farmer segments