A regression-based smoothing spline Monte Carlo algorithm for pricing American options in discrete time

American options in discrete time can be priced by solving optimal stopping problems. This can be done by computing so-called continuation values, which we represent as regression functions defined recursively by using the continuation values of the next time step. We use Monte Carlo to generate data, and then we apply smoothing spline regression estimates to estimate the continuation values from these data. All parameters of the estimate are chosen data dependent. We present results concerning consistency and the estimates’ rate of convergence.     

从尤瑟夫·海勒的“黑色幽默”文学透析美国社会

海勒的《第二十二条军规》运用讽刺暴露等手法，无情地揭露和鞭挞了战争的荒谬和不道德以及美国社会的黑暗和罪恶。     

从美国进步主义运动的领导主体看运动的特性

学术界在认识美国进步主义运动的性质方面迄今尚有分歧，存在着“旧中产阶级争夺权势说”、“企业主利益冲突说”、“城市新中产阶级价值观改造说”和“中产阶级文化重建说”等多种观点。然而对这一运动的中坚力量与领导成分的考察则表明，知识分子在运动的领导主体中，占据了相当大的比例，并发挥了先锋骨干作用。从这一角度来看，美国进步主义运动可以被界定为是一次由知识分子倡导的社会改革运动。     

试析美国高等教育中的学分制及其借鉴意义

学分制是美国高等教育系统中普遍使用的衡量高校学术工作的行之有效的手段。本文对学分制在美国高等教育体制中产生的历史、发展过程及应用的范围进行了分析、探讨, 并给予了客观的评价, 最后指出了它对于中国高等教育学术管理体制的借鉴意义, 并提出了几点个人的建议。     

What to do with “I Don't Know:” Elicitation in Ethnographic & Survey Interviews

When a researcher enters an interview, she has already construed it as being a standard type of communicative event. This article considers how a researcher's construal of a communicative event as either an ethnographic or survey interview shapes the production of information. Interview standards entail epistemological assumptions that directly inform the type of information sought and produced. I consider this process through a comparison of the elicitation techniques I employed in survey and ethnographic interviews conducted during research in Mexico. I draw on theory in linguistic anthropology on the nature of meaning in language, examining how dialogicality and interaction are essential to understanding the construal of communicative events.     

African American family life in societal context: Crisis and hope

Since 1965 hundreds of articles and books have been published about African American families. Nevertheless, our understanding of these families continues to be limited. There is a tendency to gloss over important within-group differences; thus, monolithic, stereotypic and inaccurance portrayals of Black family life are common. This paper sets aside debates of Black family pathology or viability, focusing instead on these families' essential character. The paper seeks to understand Black families on their own terms, locating them in relevant social, historical, political and cultural contexts. Key empirical patterns and trends reveal dramatic changes in Black family geographic location, headship, quality of life and socioeconomic status since 1950.A complex picture is revealed. There has been gradual but steady overall improvement alongside persistent, extreme racial disparties and pronounced class disparities among Black families. The proposed Black Family Socio-Ecological Context model specifies and connects institutional, interpersonal, environmental, temporal and cultural facts that shape the essential character of Black family life in such a way as to produce characteristics simultaneously shared and idiosyncratic. The model also provides an organized, systematic accounting of research and public policy issues relevant to the study of African American families.An early version co-authored with Richard A. English was presented during the National Council on Family Relations Meetings in Portland, Oregon, October 1980.     

论词的传播方式对词人创作热情的刺激

词一向被看作花间尊前侑酒佐欢的工具,主要功能是“娱宾遣兴”,其最主要的传播媒介是歌馆酒楼、席间尊前的歌妓口头传唱。歌妓“乞词”于词人,词人“赠词”于歌妓,不仅使词作得以保留、流传,也刺激了词人的创作热情。再者,作为词之传播主体的歌妓是词人审美观照的主要对象,女色的参与,对词人的创作也是一种刺激。词中大量的对歌妓曼妙无比的歌喉与仪态万方的姿容,甚至她们的发髻、纤足、小手、指甲等的描写,即是明证。     

电视新闻访谈节目话语分析

一、电视新闻访谈节目和国内外研究现状1.电视新闻访谈节目电视新闻访谈节目,是一种新闻性题材的电视专题访问,也是电视新闻作深度报道的形式。新闻访谈作为一种广播电视新闻体裁,有别于别的基于互动的电视节目,如“脱口秀”(talk show)、电视辩论(debate)等。新闻访谈节目主要     

20世纪美国黑人大迁徙与南部三农问题之关系

南北战争后,美国南部长期面临农业生产方式落后、农民贫困、农村社会发展缓慢等三农问题。上述问题与南部的种族问题相互交织,加剧了南部社会的落后与黑暗。这其中,南部黑人受害最为深重,他们被迫大规模迁徙到美国其他地区。20世纪美国有两次黑人大迁徙的高潮,到20世纪70年代有600多万南部黑人迁徙。美国南部的三农问题是黑人大迁徙的经济原因,但黑人大迁徙又反过来推动了三农问题的解决,由此可见迁徙自由对于解决三农问题的重要意义。     

包容性领导的探索性研究

包容性领导的概念正在成为研究的热点，目前对包容性领导的定义，学术界没有统一的认识，基于中国文化对包容性概念的理解，梳理包容性相关学术研究、文献，通过探索性访谈研究，对包容性领导的概念进行了定义，并提出包容性领导的价值。