款词文化超稳定性成因探析

“款词文化超稳定性”的成因直接受侗族家族制度、生态环境、社会政治环境、语言特殊性及其生产、生活方式等因素的共同影响.     

Pre‐procreative ages in population stability and cyclicity

Age‐specific models of population renewal (with and without feedback) which imply convergence to a stable state for some levels of fertility or feedback may imply the presence of long‐term cycling around a constant or exponentially changing equilibrium for other levels of fertility or feedback. The switch from one regime to the other is a “bifurcation.”; The conditions for bifurcation involve the roots of an analogue of Lotka's Equation.

Typically bifurcation is induced by raising the strength of feedback or the level of fertility. It has been known since the early 1980s, however, that this is sometimes impossible. It is sometimes impossible even with the linear renewal equation itself and with the most basic of non‐linear models, Lee's cohort feedback model.

Here it is proved that this typical route to bifurcation does not fail for these basic models in the presence of a condition which always holds for realistic applications with higher organisms: the existence of a span of ages before the onset of fertility.

Specifically, a strictly positive lower bound on ages of procreation is proved to be sufficient to guarantee the existence of a rescaling of Lotka's Equation for which the real part of some complex root vanishes. This result holds for absolutely Lebesgue‐integrable (signed) net maternity functions on the positive real line and for absolutely summable (signed) net maternities on the positive integers.

It follows that Coale's rescaling device for the analysis of approach to stability in stable population theory can be implemented for all realistic human net maternity schedules. It also follows that the many special cases of the cohort feedback model throughout population biology will all generate persistent cycling instead of stability if feedback is sufficiently strong.     

Efficiency or Competition? A Structural Econometric Analysis of Canada's AWS Auction and the Set‐Aside Provision

In 2008, Industry Canada auctioned 105 MHz of spectrum to a group of bidders that included incumbents and potential new entrants into the Canadian mobile phone market, raising $4.25 billion. In an effort to promote new entry, 40 MHz of spectrum was set‐aside for new entrants. In order to estimate the implicit cost of the set‐aside provision, we estimate the parameters of the bidders' profit function via a maximum match estimator based on the notion of pairwise stability in matches. We find that all telecommunications firms valued both geographic complementarities across auction licenses as well as absolute spectrum. Under a reasonable alternative scenario, our results indicate that the set‐aside led to a total profit loss of approximately 10%.     

A strong law of large numbers for independent random variables under non-additive probabilities

Abstract

Under non‐additive probabilities, cluster points of the empirical average have been proved to quasi-surely fall into the interval constructed by either the lower and upper expectations or the lower and upper Choquet expectations. In this paper, based on the initiated notion of independence, we obtain a different Marcinkiewicz-Zygmund type strong law of large numbers. Then the Kolmogorov type strong law of large numbers can be derived from it directly, stating that the closed interval between the lower and upper expectations is the smallest one that covers cluster points of the empirical average quasi-surely.     

契约型农产品渠道中专有资产投入、人际信任与关系稳定

文章探讨了收购商与农户构成的契约型农产品渠道关系中,收购商与农户双方的专有资产投入对农户信任的影响,以及农户信任对关系稳定性的影响作用.实证研究发现,收购商专有资产投入会促进农户信任,而农户专有资产投入会强化上述关系;同时,农户信任会提升其续约意愿,降低其违约倾向.此外,政府支持会强化农户信任对其续约意愿的正向影响,但会削弱农户信任对其违约倾向的负向影响.研究结论拓展了传统渠道中专有资产投入对信任影响的适用范围,指出了双方锁定的渠道关系对信任的重要作用,为农产品渠道中契约稳定性的研究提供了新视角.研究还发现,政府支持对提高契约型农产品渠道关系稳定性具有重要作用,这对制定契约型农产品渠道的管理政策具有一定的启发意义.     

一类含有随机参数的混沌系统的Hopf分岔研究

文章选取随机变量为系统的随机变量研究含有随机参数混沌系统的Hopf分岔,利用Chebyshev正交多项式逼近理论将含有随机变量的系统转化为等价的确定性系统,通过Hopf分岔定理和Lyapunov系数讨论了随机参数系统的Hopf分岔及稳定性,发现随机系统的渐进稳定性参数区间大小不仅和确定性参数有关,还与随机参数有非常密切的关系.     

An Empirical Process View of Inverse Regression

A common approach taken in high‐dimensional regression analysis is sliced inverse regression, which separates the range of the response variable into non‐overlapping regions, called ‘slices’. Asymptotic results are usually shown assuming that the slices are fixed, while in practice, estimators are computed with random slices containing the same number of observations. Based on empirical process theory, we present a unified theoretical framework to study these techniques, and revisit popular inverse regression estimators. Furthermore, we introduce a bootstrap methodology that reproduces the laws of Cramér–von Mises test statistics of interest to model dimension, effects of specified covariates and whether or not a sliced inverse regression estimator is appropriate. Finally, we investigate the accuracy of different bootstrap procedures by means of simulations.     

土地股份合作社内部能形成利益联结机制吗？

土地股份合作社在促进资本与农地结合,实现小农户与现代农业衔接上具有独特优势。通过对普通社员与核心社员在土地股份合作社不同发展阶段的可选策略的讨论,分析合作社不同发展阶段利益联结机制的特征,并对黑龙江省齐齐哈尔市克山县仁发合作社的利益联结机制进行案例研究后提出:土地股份合作社坚持“退社自由”原则有利于保护普通社员的基本权益,但不利于在合作社内部形成“风险共担”机制,要在保证普通社员基本权益的同时建立“利益共享、风险共担”的利益联结机制,应该充分利用计提公积金这一手段,不允许社员退社时退回公积金或许是有利于土地股份合作社内部形成“风险共担”机制的一个可尝试的方法。     

社会转型期弱势群体的利益表达机制探析

在20世纪90年代以来的社会转型过程中所形成的弱势群体,是和谐社会视角下的一个热点问题,也是十六届六中全会有关社会体制改革所关注的一个焦点.弱势群体的利益表达有利于政治稳定和社会和谐,有利于利益均衡和社会发展,也有利于实现社会的公平与正义.通过构建有效的弱势群体利益表达机制,使其能够拥有平等的利益表达权利,自主、理性、合法地进行利益表达,从而由权利均衡走向利益均衡,是促进弱势群体走出困境的一种有效制度安排.