Econometria: significato del test di Durbin-Watson

La Durbin Watson Statistic è un test per rilevare l'autocorrelazione dei residui (deviazioni dalla retta di regressione stimata) in una analisi di regressione con il metodo dei minimi quadrati. L'ipotesi che intende confutare è se il coefficiente di correlazione è pari a zero, ossia la non staticità (radice unitaria) dei residui della regressione. Il suo vero valore è SEMPRE compreso fra 0 e 4:

• Se dal test emerge un coefficiente Durbin Watson uguale a 2 non c'è autocorrelazione fra i residui.
• Se è molto inferiore a 2 evidenzia autocorrelazione positiva.
• Se è inferiore ad 1 ciò costituisce un chiaro segnale di allarme perchè piccoli valori del coefficiente indicano che i successivi termini di errore hanno valori mediamente simili fra loro o comunque positivamente correlati.
• Se il coefficiente è maggiore di 2 i successivi termini di errore sono molto differenti l'uno dall'altro  e negativamente correlati.                                                                                                                     

Il valore del test di Durbin Watson può essere facilmente trovato con i più comuni software statistici.

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No-Hype Options Trading: Myths, Realities, and Strategies That Really Work - Kerry Given

Myths, Realities, and Strategies That Really Work

A straightforward guide to successfully trading options Options provide traders and investors with a wide range of strategies to lock in profits, reduce risk, generate income, or speculate on market direction. However, they are complex instruments and can be difficult to master if misunderstood. No-Hype Options Trading offers the straight truth on how to trade the options market. In it, author Kerry Given provides realistic strategies to consistently generate income every month, while debunking many myths about options trading that tend to lead retail traders astray. Along the way, he makes a conscious effort to avoid complex strategies that are appropriate only for market makers or professional traders, and instead focuses on low-risk strategies that can be easily implemented and managed by a part-time trader. * Shows how you can use option spreads in conjunction with stocks to produce a regular stream of income * Each chapter includes exercises to help you master the material presented * Examines how you can adjust option positions as market conditions change in order to maintain an optimal risk/reward profile Written for anyone interested in successfully trading options, this reliable resource cuts through the hype and misinformation that surrounds options trading and presents a realistic path to profits.

Summary

A straightforward guide to successfully trading options Options provide traders and investors with a wide range of strategies to lock in profits, reduce risk, generate income, or speculate on market direction. However, they are complex instruments and can be difficult to master if misunderstood. No-Hype Options Trading offers the straight truth on how to trade the options market. In it, author Kerry Given provides realistic strategies to consistently generate income every month, while debunking many myths about options trading that tend to lead retail traders astray. Along the way, he makes a conscious effort to avoid complex strategies that are appropriate only for market makers or professional traders, and instead focuses on low-risk strategies that can be easily implemented and managed by a part-time trader. Shows how you can use option spreads in conjunction with stocks to produce a regular stream of income Each chapter includes exercises to help you master the material presented Examines how you can adjust option positions as market conditions change in order to maintain an optimal risk/reward profile Written for anyone interested in successfully trading options, this reliable resource cuts through the hype and misinformation that surrounds options trading and presents a realistic path to profits.

 
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Limited Liability Companies For Dummies, 2nd Edition - Jennifer Reuting - book+CD rom

During a time of economic uncertainty, one thing consistently on the rise has been the number of new limited liability companies. Enterprising people are using economic uncertainty as an opportunity to finally flex their entrepreneurial muscles. Limited Liability Companies For Dummies, 2nd Edition, provides clear, concise explanations on the pros and cons of LLCs and shares insider insights on everything from creating the LLC to managing its day-to-day operations. This revised edition will include 25% new and revised information, including the latest advances in technology (including online tools which streamline processes), up-to-the-minute information on federal and taxes and fees (including added benefits for LLC formers), new filing requirements, additional coverage of setting up real estate LLCs and LLCs with among family members, tailoring LLCs specifically for independent contractors (including online businesses), and much more. In addition, the author will completely revamp the books accompanying CD with new useful tools and forms, including a sample Buy-Sell Agreement, different variations on Operating Agreements, and the full gamut of documents needed to launch in each state.

Summary

Flex your entrepreneurial muscle with an LLC The previous drawbacks to forming an LLC have all but disappeared. The IRS has loosened the restrictions on entities electing partnership taxation and subsequently the states have loosened their requirements. Because LLCs are now more flexible entities than any that have ever existed, they remain an attractive option for those launchinga new or relaunching an existing business. Limited Liabilty Companies For Dummies is a clear, concise guide that explains the pros and cons of LLCs and shares insider insights on everything from choosing your members and your company name to creating and filing your Articles of Organization, to the day-to-day operation of your LLC. Plus, you'll the most current, real-world advice on customizing an LLC for your specific business needs. The latest information on federal taxes and fees New filing requirements and coverage of setting up real estate LLCs and LLCs among family members Accompanying CD includes updated tools and forms It's full-steam ahead for LLCs, and this hands-on guide addresses everything you need to know and more!

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The Leadership Pipeline: How to Build the Leadership Powered Company, 2nd Edition - Ram Charan; Stephen Drotter

An updated and revised version of the bestselling The Leadership Pipeline - the critical resource for how companies can grow leaders from the inside. In business, leadership at every level is a requisite for company survival. Yet the leadership pipeline -the internal strategy to grow leaders - in many companies is dry or nonexistent. Drawing on their experiences at many Fortune 500 companies, the authors show how organizations can develop leadership at every level by identifying future leaders, assessing their corporate confidence, planning their development, and measuring their results. New to this edition is 65 pages of new material to update the model, share new stories and add new advice based on the ten more years of experience. The authors have also added a "Frequently Asked Questions" section to the end of each chapter.

Summary

An updated and revised version of the bestselling The Leadership Pipeline the critical resource for how companies can grow leaders from the inside.   In business, leadership at every level is a requisite for company survival. Yet the leadership pipeline the internal strategy to grow leaders in many companies is dry or nonexistent. Drawing on their experiences at many Fortune 500 companies, the authors show how organizations can develop leadership at every level by identifying future leaders, assessing their corporate confidence, planning their development, and measuring their results. New to this edition is 65 pages of new material to update the model, share new stories and add new advice based on the ten more years of experience. The authors have also added a "Frequently Asked Questions" section to the end of each chapter.

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Accounting Principles, Study Guide Vol. 2, 10th Edition - Jerry J. Weygandt; Paul D. Kimmel

Weygandts Accounting Principles introduces challenging accounting concepts with examples that are familiar to accountants. The new edition has been updated with the latest IFRS/IASB standards. Additional coverage is included on foreign currency translation and LCM. More discussions focus on risk management as a result of the financial crisis. The examples also emphasize current examples in order to help accountants make the connection to their everyday lives.

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Macroeconomics as a Second Language - Martha L. Olney

The key to understanding macroeconomics for business professionals is to view it as a second language. Olney takes this innovative approach as he zeroes in on the concepts, assumptions, and models theyll need to learn. Each chapter begins with the equations and graphs that will enable them to dive into the application of economic principles. Tip notes highlight tricks that will help them remember the material, and theyll find common errors to avoid. Theyll also be able to test what theyve learned by reviewing Try questions. This approach will allow business professionals to gain an intuitive understanding of economic ideas that theyll be able use in the field.

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Regulation of Securities, Markets, and Transactions: A Guide to the New Environment - Patrick S. Collins

This book provides a description about the various government regulations of securities, securities markets, and securities transactions. The book defines, describes, and explains U.S. securities regulation.   The book will be current as of the signing of the securities reform act (expected to be signed by President Obama in mid-2010).  Major parts within the book include: Regulation; Accounting and Auditing; Introduction to Notes; Notes; Sections of Public Laws; Sections of Codified Securities Laws; Organizations.   In addition, there will be an extensive reference section, glossary, and list of useful websites (by both name and function).

Summary

The ultimate guide to the current rules and regulations that govern the securities industry including amendments in 2010. Providing readers with expert coverage of domestic securities regulation, this book fills the need for coverage of securities regulations, defining, describing, and explaining everything professionals need to know about domestic securities regulation. Examines the current securities rules Provides an overview of the latest regulations for this industry. Includes a description of the various government regulations of securities markets, and securities transactions. Since the corporate scandals of 2002, this industry has seen intense scrutiny of how it is regulated. Regulation of Securities, Markets, and Transactions demystifies the new laws and regulations with straightforward, to-the-point coverage professionals need.

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Approximate Optimization Methods and Metaheuristics in Operational Research - Marc Pirlot; Jacques Teghem

In the last few decades, a number of powerful methods have been proposed to find satisfactory solutions to management problems of great importance in economies open to competition. They have been successfully applied to solve a large variety of operational problems both in the private and public sector, for example: production scheduling and sequencing, transportation, traffic management, distribution of goods and portfolio selection. The first half of this book presents an overview of these methods, while the second half focuses on applications. More precisely, it describes how to tailor heuristics to get the best results in a variety of selected typical problems.

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