A remark on robustness of linear best estimates

Let s₀ = ||x- h₀ (x)||₀ , s(B₁ ) = ||x- h₁ (x)||₀ , s₁ (B₁ ) = ||x- h₁ (x)||₁ , \begin{gathered} \sigma _0 = \parallel \xi - \eta _0 (\xi )\parallel _0 , \hfill \\ \sigma (B_1 ) = \parallel \xi - \eta _1 (\xi )\parallel _0 , \hfill \\ \sigma _1 (B_1 ) = \parallel \xi - \eta _1 (\xi )\parallel _1 , \hfill \\ \end{gathered}     

A remark on serial correlation in maximum likelihood

Maximum likelihood estimation can be consistent and asymptotically normal despite serial correlation in the residuals. The usual estimator of the asymptotic covariance of the parameter estimator is inconsistent, but an alternative consistent estimator is derived.     

A remark on the fiscal theory of price determination

The fiscal theory of price determination asserts that the price level is determined by the ratio of nominal public debt to the present value of real primary surpluses. To show its fragility, we describe a simple monetary economy with an infinitely lived real productive asset. Under the hypotheses of the fiscal theory, speculative bubbles occur at equilibrium, thus leading to an indeterminate price level.     

A remark on the fiscal theory of price determination

The fiscal theory of price determination asserts that the price level is determined by the ratio of nominal public debt to the present value of real primary surpluses. To show its fragility, we describe a simple monetary economy with an infinitely lived real productive asset. Under the hypotheses of the fiscal theory, speculative bubbles occur at equilibrium, thus leading to an indeterminate price level.     

A remark on the recursive estimation of ARMA order

Summary It is well known how, for an ARMA process of order (p ₀,q ₀), max (p ₀,q ₀) may be recursively estimatedHannan/Rissanen. Assuming max (p ₀,q ₀) to be known and, in addition,p ₀q ₀, a simple procedure for the recursive estimation of (p ₀,q ₀) is presented.     

A remark on economic response to technological innovation

In this article differential techniques are applied to a two-sector equilibrium model of economic response to technological innovation. These techniques allow a parametric comparative statics interpretation of the model, and qualitative results on the directions of parameter shifts are obtained.     

A remark on boundary restrictions in the Global Newton method

This remark shows how Smale's method of computing fixed points can be extended to problems involving very general boundary behavior.     

A remark on topological robustness to bounded rationality in semialgebraic models

In this short note, we show that the compact semialgebraic class of Anderlini and Canning (2001) is topologically robust, i.e. the topological properties of the equilibrium set are preserved, deviating parameter values and introducing a small amount of bounded rationality.     

A remark on Lehmann-unbiased estimators for scale resp. Location parameters

Summary In this paper Lehmann-unbiased estimation of the scale and location parameter is considered. Lehmann-unbiased estimators depend strongly on the form of the loss function. Therefore quadratic and the other loss functions are discussed. Results of this paper, obtained in the class of linear statistics, can be specified to these obtained byGoodman andKiciska-Slaby [1982a, 1982b].     

A remark on rational expectation equilibria with incomplete markets and real assets

In this note, I established the existence, for a generic set of endowments, of a fully revealing rational expectation equilibrium (REE) in an economy characterized by incomplete markets and real assets.     

A remark on the existence of equilibria in markets without ordered preferences and with a Riesz space of commodities

We show the existence of competitive equilibria in economies without ordered preferences and a Hausdorff locally convex solid Riesz space of commodities. Our principal assumptions are that the commodity space has a predual and that its positive cone has a non-empty interior.     

Forecasting bank failures and stress testing: A machine learning approach

This paper presents a forecasting model of bank failures based on machine-learning. The proposed methodology defines a linear decision boundary that separates the solvent banks from those that failed. This setup generates a novel alternative stress-testing tool. Our sample of 1443 U.S. banks includes all 481 banks that failed during the period 2007–2013. The set of explanatory variables is selected using a two-step feature selection procedure. The selected variables were then fed to a support vector machines forecasting model, through a training–testing learning process. The model exhibits a 99.22% overall forecasting accuracy and outperforms the well-established Ohlson’s score.     

The impact of bank failures on local bank pricing decisions

This paper empirically tests for the existence of bank contagion at the local level. More specifically, bank-specific data for thirteen counties in Colorado and Kansas is used to perform regression analysis to test the hypothesis that the uninsured CD pricing behavior of a failing bank affects the prefailure uninsured CD pricing behavior of solvent banks within the same county as the failing institution. Quarterly data from the second quarter of 1987 through the first quarter of 1994 produce regression results that support the hypothesis. Thus, this study finds evidence of firm-specific bank contagion at a local level and extends existing contagion literature beyond an investigation of large failures during periods of crisis.     

气动泵常见故障的处理

文章介绍了气动泵的一些常见故障及解决方法,提出了使用过程中要注意的一些问题。     

电力调度运行中的常见故障和处理措施研究

电力调度运行故障问题直接影响电力运行安全,为了保证电力工程的有效性,在本次研究中,将以电力调度运行中常见的故障为基准,结合实际情况,探究切实可行的处理措施。     

现代商企营销败北例鉴

很多企业家都有一种自然的心理:留恋昔日辉煌的时刻。因此,他们本能地抑制革新的同时,也不可避免地犯了这些或那些错误。然而,正如一位著名企业家说,     

A brief note examining the impact of federal deposit insurance on savings and loan failures using granger causality tests

This brief note applies Granger causality testing to the issue of whether federal deposit insurance has caused S&L failures. The findings strongly indicate that federal deposit insurance has Granger-caused S&L failures over the 1934–1991 period.     

Predicting the failures of prediction markets: A procedure of decision making using classification models

Prediction markets have been an important source of information for decision makers due to their high ex post accuracies. Nevertheless, recent failures of prediction markets remind us of the importance of ex ante assessments of their prediction accuracy. This paper proposes a systematic procedure for decision makers to acquire prediction models which may be used to predict the correctness of winner-take-all markets. We commence with a set of classification models and generate combined models following various rules. We also create artificial records in the training datasets to overcome the imbalanced data issue in classification problems. These models are then empirically trained and tested with a large dataset to see which may best be used to predict the failures of prediction markets. We find that no model can universally outperform others in terms of different performance measures. Despite this, we clearly demonstrate a result of capable models for decision makers based on different decision goals.