上海锌期货价格的组合预测分析

本文利用锌期货价格的历史信息和上海锌的现货价、伦敦锌期货价格等分析预测上海锌期货价格。针对单一模型存在预测误差大的问题,本文结合时间序列ARIMA模型、回归模型及组合模型来分析预测锌收盘价,结果发现组合预测模型的精度高于单一模型的分析,即用组合预测模型来预测锌期货价格是一种相对可取的方法,可以为投资者和期货经纪公司提供一定的参考价值。     

基于ARIMA模型的全国公路货运量预测

本文利用2006年1月到2012年9月的全国公路货运量的时间序列数据,使用eviews 6.0软件,运用单整自回归移动平均模型即ARIMA模型,对模型进行了识别、定阶、适应性检验,最终建立了一个ARIMA(3,1,3)的预测模型。通过该模型预测了2012年我国传统的公路货运大月12月的公路货运量将达到惊人的32.275亿吨,再创历史新高。     

基于ARIMA—SVM组合模型的我国农产品价格预测研究

为准确把握国内农产品价格波动规律,提高农产品价格预测精度,构建农产品价格自回归移动平均与支持向量机（ARIMA—SVM）组合预测模型,以ARIMA模型揭示农产品价格线性变动规律,以SVM模型揭示非线性变动规律,并结合1999—2011年我国农产品价格指数月度数据,使用组合模型和ARIMA、SVM单个模型对农产品价格进行预测。预测结果显示：组合模型比单个ARIMA、SVM模型预测精度高,能够提高农产品价格预测的准确性,是一种有效的农产品价格预测模型。     

线性组合模型在徐州市能源需求预测中的应用研究

随着经济的快速发展，能源消耗也在不断的上升。在分析徐州市能源消耗的历史数据基础上，建立了徐州市能源消耗的二元线性回归模型和灰色预测模型的组合模型，通过组合模型和线性回归模型、灰色预侧模型的预测应用比较分析，证明组合模型更为精确、有效。结论表明文中提出的组合预测模型可以有效地预测能源消耗从而可以为地方政府制定科学的产业发展政策提供决策依据。     

基于灰色-马尔可夫改进的预测模型——以沪深300指数为例

建立灰色GM(1,1)与马尔可夫链的组合预测模型,用灰色预测模型预测随机时间序列数据的总体发展趋势,而用马尔可夫链模型修正数据随机波动所带来的预测误差。以沪深300指数的真实数据进行验证,结果表明:灰色马尔可夫预测模型既能预测随机数据序列的总体趋势,又适应股票价格随机波动性较大的特点,灰色马尔可夫预测模型预测精度高于GM(1,1)模型的预测精度。     

基于灰色-马尔可夫改进的预测模型——以沪深300指数为例

建立灰色GM(1,1)与马尔可夫链的组合预测模型,用灰色预测模型预测随机时间序列数据的总体发展趋势,而用马尔可夫链模型修正数据随机波动所带来的预测误差。以沪深300指数的真实数据进行验证,结果表明:灰色马尔可夫预测模型既能预测随机数据序列的总体趋势,又适应股票价格随机波动性较大的特点,灰色马尔可夫预测模型预测精度高于GM(1,1)模型的预测精度。     

基于组合预测模型的我国能源需求预测分析

本文根据预测理论,结合我国历年能源消费的相关数据,分别采用多元线性回归方法、灰色预测、指数模型方法建立我国能源需求的单项预测模型,并对各单项模型的结果进行分析比较和检验,然后采用误差平方和最小法进行权重分配,建立了我国未来能源需求量的组合预测模型,最后,应用该模型对我国未来10年的能源需求量进行预测,结果表明：组合预测的精度要远远优于单项预测;我国未来10年的能源需求仍呈现较快的增长趋势。     

企业价值评估中的定量预测模型实证分析

在采用收益途径对企业价值评估中，对企业未来发展有关情况进行分析和运用数量模型对其相关参数进行预测不仅是其重要的工作之一，也是该评估方法的技术关键。在该评估方法中，收益额是重要的预测参数之一，对其预测时，需要在定性分析的基础上，采用合适的数量模型分别对其中的收入、成本、费用等内容进行具体测算。常见的计量模型主要有：时间序列模型、单方程回归模型，灰色预测模型，神经网络模型以及组合预测模型等，本文选择其中的时间序列模型（固定时间序列和随机时间序列）、灰色预测模型和神经网络模型分别对某航运公司1994-2008年的收入进行具体预测和检验，并将其各自的预测结果进行分析和比较。     

财务困境预测模型的实证分析与改进——基于中国上市公司的研究

本文利用2010—2012年沪深两市中被ST的47家公司和47家非ST公司的财务指标,根据中国资本市场的实际状况,构建了一个系数与变量修正后的Z-score模型;然后建立一个以现金流量为基础的财务预警统计模型,共同构建财务困境预测模型组合.实证研究表明:整个预测系统的准确率较高,ST公司在T-2年前被成功预测的概率为82.98%,配合现金流财务预警模型,准确率进一步提升.所以该预测模型组合具有较大的使用和研究价值.     

基于灰色支持向量机模型的基金波动率预测

探讨灰色系统与最小二乘支持向量机组合预测模型在波动率上的应用的可行性,通过对灰色模型进行残差修正和背景值修正以及对最小二乘支持向量机进行参数寻优,来提高组合预测模型的预测精度和推广泛化能力。经波动率预测的实证分析得出建立的组合模型比支持向量机模型有较好的预测效果。     

预测中国宏观经济变量:专家与模型的组合预测

本文使用组合预测方法,探究以“朗润预测”为代表的专家预测以及计量模型对于中国宏观经济变量的预测效果,并研究对不同预测进行组合预测是否有助于改进预测效果。本文发现,对我国CPI和GDP的增长率,专家预测效果总体上优于模型预测。从原因看,一方面,专家在预测时已经考虑了计量模型的预测信息;另一方面,在经济出现“拐点”的时期,专家通过对实际经济环境和政策的把握,得出更准确的经济预测。组合预测有助于提升预测精度,对专家预测进行组合得到的预测效果优于大多数的专家预测,“模型—专家”组合预测的效果也优于所有的模型和大部分专家预测。     

The one-trading-day-ahead forecast errors of intra-day realized volatility

Two volatility forecasting evaluation measures are considered; the squared one-day-ahead forecast error and its standardized version. The mean squared forecast error is the widely accepted evaluation function for the realized volatility forecasting accuracy. Additionally, we explore the forecasting accuracy based on the squared distance of the forecast error standardized with its volatility. The statistical properties of the forecast errors point the standardized version as a more appropriate metric for evaluating volatility forecasts.We highlight the importance of standardizing the forecast errors with their volatility. The predictive accuracy of the models is investigated for the FTSE100, DAX30 and CAC40 European stock indices and the exchange rates of Euro to British Pound, US Dollar and Japanese Yen. Additionally, a trading strategy defined by the standardized forecast errors provides higher returns compared to the strategy based on the simple forecast errors. The exploration of forecast errors is paving the way for rethinking the evaluation of ultra-high frequency realized volatility models.     

Forecasting gold volatility with geopolitical risk indices

This paper tries to forecast gold volatility with multiple country-specific (GPR) indices and compares the role of combined prediction models and dimension reduction methods regarding the improvement of gold volatility prediction accuracy. For this purpose, GARCH-MIDAS model’s several extensions are used. We find firstly that most country-specific GPR indices have driving effects on gold volatility, and it makes sense to take forecast information from multiple country-specific GPR indices into account when forecasting gold volatility. The out-of-sample empirical results also indicate that the dimension reduction methods yield better predictions compared to the combined prediction models. In addition, dimension reduction technologies have excellent forecasting performance mainly during low gold volatility periods. Finally, our empirical findings are robust after changing the evaluation method, model settings, in-sample length and gold market.     

Tactical Industry Allocation and Model Uncertainty

We use Bayesian model averaging to analyze industry return predictability in the presence of model uncertainty. The posterior analysis shows the importance of inflation and earnings yield in predicting industry returns. The out‐of‐sample performance of the Bayesian approach is, in general, superior to that of other statistical model selection criteria. However, the out‐of‐sample forecasting power of a naive i.i.d. forecast is similar to the Bayesian forecast. A variance decomposition into model risk, estimation risk, and forecast error shows that model risk is less important than estimation risk.     

Determinants of analysts’ revenue forecast accuracy

This study investigates financial analysts’ revenue forecasts and identifies determinants of the forecasts’ accuracy. We find that revenue forecast accuracy is determined by forecast and analyst characteristics similar to those of earnings forecast accuracy—namely, forecast horizon, days elapsed since the last forecast, analysts’ forecasting experience, forecast frequency, forecast portfolio, reputation, earnings forecast issuance, forecast boldness, and analysts’ prior performance in forecasting revenues and earnings. We develop a model that predicts the usefulness of revenue forecasts. Thereby, our study helps to ex ante identify more accurate revenue forecasts. Furthermore, we find that analysts concern themselves with their revenue forecasting performance. Analysts with poor revenue forecasting performance are more likely to stop forecasting revenues than analysts with better performance. Their decision is reasonable because revenue forecast accuracy affects analysts’ career prospects in terms of being promoted or terminated. Our study helps investors and academic researchers to understand determinants of revenue forecasts. This understanding is also beneficial for evaluating earnings forecasts because revenue forecasts reveal whether changes in earnings forecasts are due to anticipated changes in revenues or expenses.     

The Taylor Rule and Forecast Intervals for Exchange Rates

In this paper, we examine the Meese–Rogoff puzzle from a different perspective: out‐of‐sample interval forecasting. While most studies in the literature focus on point forecasts, we apply semiparametric interval forecasting to a group of exchange rate models. Forecast intervals for 10 OECD exchange rates are generated and the performance of the empirical exchange rate models are compared with the random walk. Our contribution is twofold. First, we find that in general, exchange rate models generate tighter forecast intervals than the random walk, given that their intervals cover out‐of‐sample exchange rate realizations equally well. Our results suggest a connection between exchange rates and economic fundamentals: economic variables contain information useful in forecasting distributions of exchange rates. We also find that the benchmark Taylor rule model performs better than the monetary, PPP and forward premium models, and its advantages are more pronounced at longer horizons. Second, the bootstrap inference framework proposed in this paper for forecast interval evaluation can be applied in a broader context, such as inflation forecasting.     

北京市软件与信息服务业发展预测

灰色GM(1,1)模型可以预测较短时间序列的发展态势,马尔可夫模型可以对具有随机波动性的时间序列进行预测。本文结合了两种模型的特点,综合预测了2008年和2009年北京市软件与信息服务业营业收入可能达到的规模,从而对新兴产业的发展预测提供了一种尝试。     

Forecasting the Term Structure of South African Government Bond Yields

This article uses the parsimonious dynamic Nelson–Siegel model to fit the yields of South African government bonds. We find that the dynamic Nelson–Siegel model has good fitting abilities for all maturities. We further forecast the term structure by seven different dynamic Nelson–Siegel models with time series models. We find that the DNS–VAR–GARCH model is useful for forecasting the short-term rates, the DNS–VAR best predicts the medium-term rates, and the DNS–RW best predicts the long-term rates. In addition, the dynamic Nelson–Siegel models provide better forecasts of yield data than a random walk model, especially for the 12-month forecasting horizons.     

A Bayesian encompassing test using combined value-at-risk estimates

The Value at Risk (VaR) is a risk measure that is widely used by financial institutions in allocating risk. VaR forecast estimation involves the conditional evaluation of quantiles based on the currently available information. Recent advances in VaR evaluation incorporate conditional variance into the quantile estimation, yielding the Conditional Autoregressive VaR (CAViaR) models. However, the large number of alternative CAViaR models raises the issue of identifying the optimal quantile predictor. To resolve this uncertainty, we propose a Bayesian encompassing test that evaluates various CAViaR models predictions against a combined CAViaR model based on the encompassing principle. This test provides a basis for forecasting combined conditional VaR estimates when there are evidences against the encompassing principle. We illustrate this test using simulated and financial daily return data series. The results demonstrate that there are evidences for using combined conditional VaR estimates when forecasting quantile risk.