国际学术会议发言稿(精选多篇)
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国际学术会议发言稿(精选多篇) 1. prologue thank you, mr. chairman, for your gracious introduction. i am honored to have the chance to address you on this special occasion. the topic of my paper is “transaction cost and farmers’ choice of agricultural products selling”. the outline of my talk as follows. the first part i want to introduce the background of this research. the second part suggests a simple household choice model .the third part covers the data used in this research. and then, we introduce the empirical results. finally, a simple conclusion is given. 2. introduction well, let’s move on the first part of this topic .the motivation of this work like this. institutional economics posits that agents making decisions on different types of transactions do so in a costly way .for example , farmers deciding sell a particular crop to whom base their decisions not only on the price they expect to receive in each market choice but also on additional costs related to transacting in these markets. i want to use a picture to illustrate it. for example, given some market channels, farmers’ choices can be regarded as equilibrium between the surplus and the additional costs that related to transacting .especially in developing countries, high-value crop producers fully participate in the market and the transaction cost has been the hard constraint to farmers. furthermore, farmers’ market choices can be taken as a choice dilemma of transaction cost and production surplus. consequently, the scientific question of this research is how transaction cost affects planters’ choices. 3. methodology let’s move to the theoretical model of our research. consider a household model in one rotation. in stage 1 , famer η needs to allocate the input factors .this process can qbe set into a function like this q? ? q , qη means the output farmers decide qto produce .p implies the output price w implies input price and.z: ? is fixed input. once produce what and produce how many are decided, next question to be considered is how much products to be transacted in market. here we use three cccη means how functions to describe this question. the first equation, c ? ?p , z ? much agricultural products used by famers themselves. p implies the price the cagricultural product,z ?suggests the fluctuation of cη. the second equation q ? ? q ? ?c?, qη means the amount of agricultural products transacted in q?n?market. the third equationi ? q ?implies the amount exchanged in nth time. in stage 3, farmers will decide to sell the products to whom. chanel j’s market price is bdecided by an exogenesis price and farmers’ negotiating power.pij?p* j?bbesides this, we use a matrix to show the net profit of chanel jx ik? ik, ? ?? ik ? and then farmers’ choice can be expressed in a typical choice model exppr?1 exp? k?1 based on the choice model, another important concept is famers’ channel choice .here, we set five types .they rank by the market barriers. accordingly, we set a group discrete number to express them. y: dependent variable y=5,means farmer choose brokers. y=1, farmers sell products to consumers directly. 4. data and estimation procedures here, we illustrate the data distribution with this map. according to the agricultural regionalization from department of agriculture, the apple specialization areas in china contain two parts: bo sea area and loess plateau. bo sea area in red color, contains hebei, shandong and liaoning 3 provinces. and loess plateau in green color, contains shanxi, henan, shaanxi and gansu 4 provinces. firstly, we use pps method to get the first stage sampling unit 14 counties in 7 provinces. then use random sample method to get village and household. they are our sample distribution. 5. empirical results 6. conclusions 以单一元素作为议题而举行的国际研讨会，硒是最早的，也是唯一的一个，每五年举办一次，至今已召开八届。其中，第三届和第六届都在中国北京举办；2014年，第八届“硒在生物医药中的应用”国际会议在美国威斯康星大学隆重召开，纳米硒是本届硒全球大会来自中国的唯一参展商。由此可见硒对人体健康的重要性。 硒在人体中的作用是广谱的。迄今为止，已知人类有490余种疾病与缺硒有直接关系。人们把硒称为“明星营养素”、“抗癌之王”等等，国际上发表的硒的生物医学研究科学论文已经超过一万篇，是其他微量元素所不能比拟的。 关于举办首届“国际学术会议模拟大赛”的通知 为提升研究生综合素质，开阔研究生国际化视野，提升研究生英语交流和沟通能力，展现研究生群体学术功底，校研究生会将举办“2014年研究生文化节”之国际学术会议模拟大赛，现将有关事宜通知如下：
