全文获取类型
收费全文 | 24334篇 |
免费 | 545篇 |
国内免费 | 1篇 |
专业分类
财政金融 | 4644篇 |
工业经济 | 1735篇 |
计划管理 | 3617篇 |
经济学 | 5354篇 |
综合类 | 389篇 |
运输经济 | 182篇 |
旅游经济 | 450篇 |
贸易经济 | 3733篇 |
农业经济 | 1267篇 |
经济概况 | 3451篇 |
信息产业经济 | 1篇 |
邮电经济 | 57篇 |
出版年
2021年 | 139篇 |
2020年 | 250篇 |
2019年 | 423篇 |
2018年 | 506篇 |
2017年 | 526篇 |
2016年 | 534篇 |
2015年 | 302篇 |
2014年 | 544篇 |
2013年 | 2509篇 |
2012年 | 728篇 |
2011年 | 821篇 |
2010年 | 679篇 |
2009年 | 754篇 |
2008年 | 741篇 |
2007年 | 634篇 |
2006年 | 580篇 |
2005年 | 491篇 |
2004年 | 512篇 |
2003年 | 465篇 |
2002年 | 512篇 |
2001年 | 445篇 |
2000年 | 461篇 |
1999年 | 446篇 |
1998年 | 412篇 |
1997年 | 423篇 |
1996年 | 417篇 |
1995年 | 361篇 |
1994年 | 368篇 |
1993年 | 399篇 |
1992年 | 409篇 |
1991年 | 401篇 |
1990年 | 331篇 |
1989年 | 303篇 |
1988年 | 292篇 |
1987年 | 302篇 |
1986年 | 309篇 |
1985年 | 468篇 |
1984年 | 433篇 |
1983年 | 400篇 |
1982年 | 376篇 |
1981年 | 345篇 |
1980年 | 390篇 |
1979年 | 318篇 |
1978年 | 270篇 |
1977年 | 256篇 |
1976年 | 198篇 |
1975年 | 242篇 |
1974年 | 193篇 |
1973年 | 188篇 |
1972年 | 133篇 |
排序方式: 共有10000条查询结果,搜索用时 156 毫秒
131.
An aggregate analysis of supply response in the paddy (rice) sector of Sri Lanka during 1952-87 is conducted to identify the impact of pricing policy, irrigation programmes, institutional credit and concessional sales on area, yield and overall supply. The focus of the estimation procedure is the selection of an appropriate functional form for regressions and on the price variable that best represents the price to which producers respond in making area and yield decisions. In the case of both area and yield, the econometric criteria favour the acceptance of log-linear equations with the ratio of the guaranteed price of paddy to fertiliser price. On the basis of overall supply elasticity estimates, it is concluded that while pricing policy, irrigation programmes and institutional credit provide incentives to the expansion of paddy production, concessional sales of rice act as a disincentive. 相似文献
132.
This paper presents empirical evidence regarding key assumptions of the Rothbarth and Barten methods of constructing household equivalence scales. The assumption of separability in the Rothbarth model is investigated by examining the implied intra-household allocation of specific goods and by examining studies of economies of scale in household consumption. The assumption of the exogeneity of the distribution parameters in the Barten model is related to the results of empirical studies of clothing expenditures. This paper suggests that empirical evidence fails to support the assumptions maintained in these theoretically sophisticated models of household income equivalence. 相似文献
133.
134.
135.
Countries on fixed exchange rates sometimes use uniform tariffcum subsidy (UTCS) schemes as a way of achieving a real depreciationwithout disturbing the nominal exchange rate. A potential drawbackof this policy in relation to an across-the-board devaluationis that a UTCS scheme provides incentives for illegal trade.Using an optimizing model with currency convertibility and illegaltrade. I find that welfare is lower under a UTCS scheme thanunder a corresponding across-the-board devaluation and thatin some cases the real exchange rate actually appreciates inresponse to an increase in the UTCS rate. 相似文献
136.
137.
This paper considers the extent to which price and income proxy variables help in forecasting tourist demand in Spain. Contrary to some recent studies, we found that the inputs' contribution in terms of fitting and forecasting is nil when compared with alternative univariate models. Whether these findings are the results of the restrictions embedded in building the proxy inputs or in a poor specification of the dynamics of these models remains to be seen. We also contend that when dealing with medium, long-term forecasting comparisons, the use of the traditional aggregate accuracy measures like RMSE and MAPE help very little in discriminating among competing models. In these situations, predicted annual growth rates may be a better alternative. 相似文献
138.
This study uses data on intra-day transactions to analyze whether real estate investment (REIT) liquidity as measured by the bid-ask spread changed from 1990 to 1994, a period during which the industry's market capitalization increased from $8.7 billion to $45 billion. REIT percentage spreads (spread as percentage of share price) narrowed significantly, primarily attributable to higher share prices rather than narrower dollar-value spreads. An empirical model is used to analyze the determinants of percentage spreads. Return variance and share price, not market capitalization are found to be the primary determinants of percentage spreads in both periods. This suggests that the liquidity of REIT securities is similar to that of non-REIT securities with similar prices and return variance. In addition, percentage spreads are wider for REITs trading on the NASDAQ. 相似文献
139.
140.