This document has evolved over three years to meet the need for a more comprehensive understanding of how neighborhoods change. The Office of Policy Development and Research at HUD formulated policy alternatives to stem the rising tide of abandoned residential buildings. It showed abandonment as the last stage of a process, not a random or isolated phenomenon. The failure of programs to counteract and halt the decline of neighborhoods has stemmed mainly from an imperfect understanding of this process. There have also been political problems with acting in neighborhoods before the symptoms were painfully evident and from the tendency of program developers to deal with the house, rather than the people who own it, rent it, loan on it, or insure it. Few programs have recognized that those people were part of a total neighborhood rather than occupants of individual buildings. The process of neighborhood change is triggered and fueled by individual, collective and institutional decisions. These are made by a myriad of people-households, bankers, real estate brokers, investors, speculators, public service providers (police, fire, schools, sanitation, etc.) and others. It is a reasonable conclusion that if a concentrated effort is made to affect these decisions then neighborhood decline can be slowed, halted, or in some circumstances, reversed.

Risk is related to the magnitude and uncertainty of an output (consequence or outcome); outputs take on different identities in different disciplines and situations. Risk is peculiar to each stakeholder and the measurement scale for risk depends on the stakeholder’s value system. Risk management provides a way of addressing the issues associated with the magnitude and uncertainty of outputs. This book provides a distinctively rational treatment of risk and risk management, based on a systems approach. The book’s treatment applies to all disciplines and sets out the principles of risk and risk management as well as looking at a range of applications and more specialist tools and approaches. The book: Develops a risk framework through a systems approach Offers a challenging and fresh approach for infrastructure engineering, construction and project management in general The book will suit students and practitioners alike.

This is an open access book. 2022 International Conference on Mathematical Statistics and Economic Analysis(MSEA 2022) will be held in Dalian, China from May 27 to 29, 2022. Based on probability theory, mathematical statistics studies the statistical regularity of a large number of random phenomena, and infers and forecasts the whole. Economic development is very important to people's life and the country. Through data statistics and analysis, we can quickly understand the law of economic development. This conference combines mathematical statistics and economic analysis for the first time to explore the relationship between them, so as to provide a platform for experts and scholars in the field of mathematical statistics and economic analysis to exchange and discuss.