城乡发展差距的人力资本解释

人力资本在城市和农村具有不同的溢出效应,农村人力资本具有强烈的外溢性特征,而城市人力资本则具有强烈的内溢性特征。长期以来,农村人力资本对城市经济发展形成了强有力的支持,而城市人力资本则形不成对农村的支持。建国以来城乡之间在人力资本投入及形成后的人力资本作用的发挥上,都存在着城市对农村的“剥夺”,而且这种剥夺远远超过了人们常常提到的以往和正在进行的对农民利益的三次“剥夺”。我们认为,政府在着手解决农村、农业和农民问题时,应该从根本上即从人力资本投资及完善农村人力资本运行环境上入手,使农村人力资本能够对农村经济发展发挥很好的作用,并在一定程度上吸引城市人力资本,只有这样才能真正缩小城乡收入差距。     

Budget Stabilization Fund: Structural Features of the Enabling Legislation and Balance Levels

This article examines what leads to high balances of the budget stabilization fund (BSF) to make it a countercyclical fiscal tool. Checking state BSF laws, this article classifies BSF structural features into purposes, funding sources, balance caps, and use approval procedures. Using panel data (1979–1999) and controlling for related variables, this article tests the features' effects on BSF levels over the sample period and different phases of the economy to identify specific effects of the features in boom and lean years. The article also forwards policy recommendations for state governments to consider in designing or revising their BSF legislation.     

A highly polymorphic STR locus in Cannabis sativa

We report on the first short tandem repeat (STR) locus to be isolated from the plant Cannabis sativa. The STR locus, isolated by a hybrid-capture enrichment procedure, was found to contain a simple sequence repeat motif of 6 bp. This 6 bp repeat motif showed no variation in repeat length but with minor variations in repeat unit sequences. The data show the locus to be highly polymorphic with the number of repeat units ranging from 3 to 40 in 108 screened samples. The observed heterozygosity was approximately 87.04%. The forward and reverse primers (CS1F and CS1R) produced no PCR products in cross-reaction study from 20 species of plants, including highly related species such as Humulus japonicus and Nicotiana tabacum. This hexanucleotide repeat DNA locus could be used to identify cannabis samples and predict their genetic relationship as the test is specific to C. sativa and is highly reproducible.     

α_2HS-糖蛋白、α_1-抗胰蛋白酶和GC的同步分型与应用

作者应用等电聚焦技术,建立了同步检测α_2HS-糖蛋白表型,α_1-抗胰蛋白酶亚型和GC亚型的方法。本法累计个人识别机率为0.9701,累计非父排除率为0.5811、是国内外同步电泳分型史鉴别效率最高的方法。在11例亲子鉴定中应用本法取得了满意结果。     

Gc蛋白的分离纯化

本文报道Gc蛋白的分离与纯化.人血浆经DEAE-Sephadex-A50, Sephadex G100和DEAE-Sephadex-A50三次柱层析即可获得纯化Gc.纯化Gc经PAGE, SDS-PAGE和免疫电泳等证明,其纯度和特异性均符合要求.     

抗GC血清的制备及鉴定

作者用分离纯化的GC蛋白免疫新西兰兔制备了抗GC血清。鉴定结果表明,抗GC血清与进口商品抗GC血清特异性相同;与人血清其他蛋白没有交叉反应。琼脂双向扩散法测得抗血清效价为128;可检出GC蛋白的最低浓度为3.1μg/ml。免疫电泳法可测出入血清三种GC表型。     

HEART TO HEART

<正>Growing exchanges bring African and Chinese people closer together By Hou WeiliAlthough she was born thousands of miles away in a village near Dar es Salaam,Tanzania,Hilder Edimund Malecela describes her relationship with China as close,almost family-like.As a Swahili translator of Chinese TV dramas,the