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For every country, the census is a very important national survey. Many people, including some lay people, often understand the census as a simple population registration, for them, as long as it is not repeated, the census is a simple, little technical work. On the contrary, the census is a very complex and extremely heavy system project. The problem is how to solve the problem of "no duplication and no omission" in the population register. In fact, due to subjective or objective, intentional or unintentional, based on the interests of individuals, families or a small number of units, local governments, etc., it is simply impossible for the census to be carried out without duplication or omission. For example, how to register long-term migrant populations, and how to deal with and correct the problem of underreporting caused by subjective intentional concealment. Therefore, after the completion of each census registration process, the quality of its registration should be assessed and the necessary corrections should be made to the registration errors. Therefore, the census not only requires a sound and strict organization and a standardized and strict process in the implementation, but also requires scientific and feasible methods. The assessment of census quality is mainly the assessment of various types of census errors and their correction. For example, the net error of the census is an important indicator that must be calculated in the assessment. The census net error is defined as the difference between the number of census registrations and the actual number of people. In this regard, an estimate of the actual number of people needs to be constructed to calculate the net error described above. In 1980, the United States pioneered the use of dual-system estimators in census quality assessments to construct estimates of actual numbers, derived from statistical capture-recapture models. Since then, the research and application of dual-system estimators have become an international frontier in the field of census quality assessment. Professor Hu Guihua of Chongqing Technology and Business University closely followed this international frontier and completed this monograph after more than ten years of painstaking research. This book is also the final research result of the National Social Science Foundation project chaired by Professor Hu in 2010, and is an academic monograph that systematically expounds the basic theory and basic methods of census quality assessment with dual-system estimators as the core content, written by the author in related fields. This book absorbs and uses contemporary international advanced theories and methods, especially mathematical statistical models and analysis techniques, comprehensively and systematically expounds all aspects of the whole process of census quality assessment, combines theory and practice, and deeply analyzes the deep-seated theoretical problems. This book also studies various methods of census quality assessment from the practice of Chinese census quality assessment, and also makes a forward-looking exploration of possible methods for future census quality assessment. This has laid the foundation for the establishment of a scientific, reasonable and feasible population census quality assessment system that conforms to China's national conditions and has the international leading level. Several numerical simulation cases are given in the book to calculate the complete calculation process of the two-system estimator and its variance estimator. This provides specific calculation methods and procedures for the quality assessment of China's future census, which helps the staff of practical departments to understand and apply the theory proposed in this book, and achieves the goal of using theory to solve practical problems. Although I have never worked with the two authors of this book, I have a good understanding of their work because I have participated in the evaluation of outstanding achievements in the National Social Science Foundation (Statistics) and National Statistical Science on many occasions, and have more contacts with the National Bureau of Statistics, especially in statistical surveys (including population censuses and sample surveys). Professor Hu Guihua has high academic attainments in the field of census quality assessment, and has presided over a number of national, provincial and ministerial scientific research projects related to census quality assessment, and published many papers on census quality assessment in academic journals such as Statistical Research, Quantitative and Technical Economic Research, Chinese Science, and Mathematical Statistics and Management. It can be said that he is currently the most accomplished and authoritative researcher in the field of census quality assessment in China. Senior statistician Wu Jie has long been engaged in the research of population sample survey, she is the main formulator of the fifth and sixth population census quality assessment programs in China, and she introduces these programs and their implementation rules in detail in this book, which is also of great research value. It is hoped that the publication of this book can play a positive guiding role in China's census quality assessment, drive more domestic scholars to engage in research in this field, and enable China, a populous country, to be at the forefront of the world's census quality assessment in the near future and make due contributions to the international community. Special thanks also to China Social Sciences Press and Chongqing Technology and Business University for their contributions and efforts in the publication of this book. Feng Shiyong in Beijing in August 2016(AI翻译)
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