大型高新技术企业NPD创意筛选模型研究

创意筛选对于大型高新技术企业新产品开发具有重要意义。在梳理相关文献的基础上,提出大型高新技术企业新产品开发创意筛选的概念模型,并针对创意筛选实践中的关键问题,运用BFPRT算法进行处理,构建了大型高新技术企业创意筛选实施过程,具有一定的理论与实践借鉴意义。     

基于研发战略的企业NPD项目关键因素分析

在分析相关国外文献的基础之上,从研发战略的角度提炼出决定企业新产品研发(NPD)项目成功与否的关键影响因素,设计问卷并调查了国内97家企业,应用SPSS软件对数据进行因子分析,找到3个公共因子,并建立了基于研发战略的NPD项目关键因素概念模型。     

基于NPD项目成功标准的产品创新影响因素研究

成功开发新产品对于企业发展有着重要的意义。在文献研究的基础上,构建了基于"关键因素—优势地位—新产品成功"观点的企业成功开发新产品的概念模型。通过对国内企业382个新产品开发项目的实证分析,研究发现,开发新产品企业的营销能力因素、技术能力因素、产品推广能力因素和供应商整合能力因素会影响新产品的差异化水平和投放市场时机,从而影响新产品在财务绩效、市场机会和技术领先方面达到成功。     

复杂系统NPD风险分析:以铱星通信系统为例

在构建了三维度创新风险分析框架的基础上,以铱星通信系统NPD为案例,对创新风险进行了比较系统的分析。得出的结论是:铱星系统创新的关键风险是复杂系统的创新周期过长、铱星公司治理结构的复杂性所导致的管理低效率。     

Is China different? A meta-analysis of export-led growth

We examine whether China has benefited more from exports than other countries. The results show that exports have been more significant for growth in China than in other countries, even when China is compared with other transition economies.     

绿色新创企业NPD组织环境对变革型领导与绿色产品创新的中介关系研究

为了探索实施绿色创业战略时变革型领导在利用式绿色产品创新和探索式绿色产品创新中的作用，将新产品开发（NPD）组织环境作为变革型领导与绿色产品创新间的中介变量，将NPD组织环境划分为兼容性与重要性和资源综效，构建了变革型领导-新产品开发组织环境-绿色产品创新的连锁关系模型，并以国内4个城市218家企业为样本进行实证分析。研究发现：变革型领导可以通过对新产品开发组织环境的掌控间接控制利用式绿色产品创新和探索式绿色产品创新两类创新，当组织需要开发探索式绿色产品时，变革型领导可以通过加强和突显新产品开发组织环境的兼容性与重要性，促进探索式绿色产品创新；当组织需要开发利用式绿色产品时，变革型领导可以通过加强和突显新产品开发组织环境的资源综效，促进利用式绿色产品创新。     

Are momentum traders different? Implications for the momentum puzzle

This article examines the puzzlingly high unexploited momentum returns from a new perspective. We analyse characteristics of momentum traders in a sample of 692 fund managers. We find that momentum traders are ‘defined’ by their short-term horizon, by a behavioural view on the market and by a somewhat lower degree of risk aversion, whereas they are like other fund managers with respect to sophistication. This is consistent with the interpretation that momentum returns may compensate for the risk of momentum trading on short-term horizons and that the short-term oriented momentum traders are not in a position to perform long-term arbitrage.     

Inequality and happiness: are Europeans and Americans different?

We study the effect of the level of inequality in society on individual well-being using a total of 123,668 answers to a survey question about “happiness”. We find that individuals have a lower tendency to report themselves happy when inequality is high, even after controlling for individual income, a large set of personal characteristics, and year and country (or, in the case of the US, state) dummies. The effect, however, is more precisely defined statistically in Europe than in the US. In addition, we find striking differences across groups. In Europe, the poor and those on the left of the political spectrum are unhappy about inequality; whereas in the US the happiness of the poor and of those on the left is uncorrelated with inequality. Interestingly, in the US, the rich are bothered by inequality. Comparing across continents, we find that left-wingers in Europe are more hurt by inequality than left-wingers in the US. And the poor in Europe are more concerned with inequality than the poor in America, an effect that is large in terms of size but is only significant at the 10% level. We argue that these findings are consistent with the perception (not necessarily the reality) that Americans have been living in a mobile society, where individual effort can move people up and down the income ladder, while Europeans believe that they live in less mobile societies.     

Why firms set different export prices? Evidence from Spain

Using firm-level export data for the 2010–2014 period, we investigate the variation of export prices across and within Spanish manufacturing firms. We find that more productive firms set higher export prices. However, this result is not robust to controlling for other firm-level characteristics and alternative productivity measures. We show that firms set higher export prices in more distant markets and in destinations with high GDP per capita, and lower export prices in large and low-competition markets. These latter results suggest that firms adjust the quality of their products to destination characteristics.     

Optimal allocation of watershed management cost among different water users

The issue of water scarcity highlights the importance of watershed management. A sound watershed management should make all water users share the incurred cost. This study analyzes the optimal allocation of watershed management cost among different water users. As a consumable, water should be allocated to different users the amounts in which their marginal utilities （MUs） or marginal products （MPs） of water are equal. The value of MUs or MPs equals the water price that the watershed manager charges. When water is simultaneously used as consumable and nonconsumable, the watershed manager produces the quantity of water in which the sum of MUs and/or MPs for the two types of uses equals the marginal cost of water production. Each water user should share the portion of watershed management cost in the percentage that his MU or MP accounts for the sum of MUs and/or MPs. Thus, the price of consumable water does not equal the marginal cost of water production even if there is no public good.     

Cross-sectional and time-series momentum returns: are Islamic stocks different?

We search for differences in both unconditional and conditional momentum returns of Islamic and Non-Islamic stocks and test implications of competing behavioural theories that aim to explain momentum returns. Our results show that there is no significant difference in momentum returns between Islamic versus Non-Islamic stocks with respect to both cross-sectional (CS) and time-series (TS) momentum strategies even when we condition momentum returns on market dynamics, information uncertainty and idiosyncratic volatility. We also find that the TS strategy outperforms (underperforms) the CS strategy in market continuations (transitions) consistent with the recent evidence in the U.S. market.

Furthermore, we find that CS and TS strategies of both Islamic and Non-Islamic stocks are profitable only when the market continues in the same state consistent with overconfidence driving momentum returns of both Islamic and Non-Islamic stocks.     

Is households’ risk attitude robust to different experimental payoffs?

We compared risk attitudes among rural people in Tanzania and Kenya using an experimental design where payoffs were defined and quantified in maize and milk production. About 42% of the sample revealed different risk attitude between the two payoff types. The difference was mainly explained by household livelihood strategy, geographical location and ethnicity. Hence, appropriate pay-off metrics differ across contexts and different metrics may provide noncomparable results that does not reflect intrinsic risk attitude.     

Age effects in Okun’s law with different indicators of unemployment

We reassess the results from the literature on the relationship between the youth unemployment rate and GDP growth (Okun’s law), based on the concern that the unemployment rate is not an ideal indicator for teenagers and young adults. Using the unemployment ratio instead, we find that youth unemployment (15–24 years old) is not significantly more responsive to economic growth than prime-age (25–64) unemployment. However, compared to prime-age unemployment, teenagers’ unemployment (15–19) is relatively unresponsive, whereas young adult’s (20–24) unemployment is more strongly correlated with economic growth. These results are quite different than those obtained with the unemployment rate as the dependent variable.     

Why is China different from Eastern Europe? Perspectives from organization theory

We draw from recent work in organization theory to explain the differences in reform strategies between China and Eastern Europe. An experimentation approach was adopted in China whereas a big bang approach was more favored in Eastern Europe. The explanation is based on differences in the organizational structure of central planning: U-form in Eastern Europe and M-form in China. The M-form is more flexible because it makes local experiments possible, contrary to the U-form where this would give rise to major complications in coordination.     

When does inflation hurt economic growth? Different nonlinearities for different economies

The effects of inflation on growth are shown to change substantially as the inflation rate rises. Moreover, the nonlinearities are quite different for industrial economies than for developing countries. Whereas it is often assumed that inflation does not significantly hurt growth in developing countries until the 20–40% range, we find that the threshold falls within single digits. Marginal growth costs for developing countries then decline significantly above 50% inflation. Failure to account for nonlinearity biases downward the estimated effects of inflation on growth. Mixing industrial and developing economies together also produces unreliable results.     

Tobit or OLS? An empirical evaluation under different diary window lengths

Researchers analysing time-use data often estimate limited dependent variable models because time spent must be nonnegative and cannot be more than the total amount of time in a given observation period. While the traditional empirical technique applied to such cases is maximum likelihood estimation of a Tobit (censored regression) model, recent debate has questioned whether linear models estimated via Ordinary Least Squares (OLS) are preferable. On the one hand, Tobit models are deemed necessary to address the significant censoring (i.e. large numbers of zeroes) typically found in time-use data, in the face of which OLS estimators would be biased and inconsistent. Yet, optimization occurs over a longer period than that covered by the typical time diary (often a day), and thus some argue that reported zeroes represent a measurement problem rather than true nonparticipation in the activity, in which case OLS would be preferred. We provide direct empirical evidence on this question using the Australian Time Use Surveys, which record time-use information for two consecutive diary days, by estimating censored and linear versions of a parental child care model for both 24-hour and 48-hour windows of observation in order to determine the empirical consequences of estimation technique and diary length.     

The real exchange rate and economic growth: are developing countries different?

Recent research has found a positive relationship between real exchange rate (RER) undervaluation and economic growth. Different rationales for this association have been offered, but they all imply that the mechanisms involved should be stronger in developing countries. Rodrik (2008 Rodrik, D. 2008. The real exchange rate and economic growth. Brookings Papers on Economic Activity, 2: 365–412.  [Google Scholar]) explicitly analyzed and found evidence that the RER–growth relationship is more prevalent in developing countries. We show that his finding is sensitive to the criterion used to divide the sample between developed and developing countries. Using alternative classification criteria and empirical strategies to evaluate the existence of asymmetries between groups of countries, we find that the effect of currency undervaluation on growth is indeed larger and more robust for developing economies. However, the relationship between RER undervaluation and per capita GDP is non-monotonic, and is limited largely to the least developed and richest countries. This discontinuity constitutes a puzzle that calls for closer analysis.     

How different are the production functions of the European manufacturing sectors? New empirical evidence

The neo-classical model of international trade assumes that the Total Factor Productivity (TFP) of a sector is common across countries, that returns to scale are constant and that the sectoral production of the countries differs by virtue of the factor endowments. In this article, we consider whether the differences in production can also be explained by the economies of scale in the national industries and by the technological differences across countries. To test this hypothesis, we estimate three models proposed in Harrigan (1999 Harrigan, J. 1999. Estimation of cross-country differences in industry production functions. Journal of International Economics, 47: 267–93.  [Google Scholar]) with data for eight European Union (EU) Member States covering the period 1978 to 1992 and analyse how the TFP changes from country to country.     

Time-varying transmission effects of external shocks into inflation: how different is China from Korea?

This article examined the time-varying effects of external shocks that determine inflation on Chinese and Korean consumer price index (CPI) inflation, using data from the period 2010:1 to 2013:4. For this experimentation, we adopted the Kalman filter algorithm. Key findings include the following: first, the lagged CPI inflation is the main determinant of inflation rate in both China and Korea that is significant and has positive effects. Second, as expected, the effects of independent variables on CPI inflation rate have a considerable difference in China and Korea from the coefficients’ size and sign. Especially, China’s CPI inflation is mainly affected by domestic output growth, while Korea is more readily affected by external shocks. Third, we confirmed the time-varying effects. For instance, the positive effect of the output variable is decreasing in the Chinese inflation equation, but its negative effect is decreasing in the Korean inflation equation. Finally, we can guess Korea is a more import dependent economy than China and also the trends of estimated coefficients of China’s inflation are changing similarly to Korea. It has been proved from recent changes that there is a decreasing effect of output growth, but negatively and increasing effects of exchange rate and import dependence. Hence, those recent changes imply that this is caused by the change of the Chinese economy to be more trade dependent as well as we cannot deny the possibility of the external factors that play a role in CPI inflation, and its influence is gradually increasing in China.