Agriculture's importance economic progress Essay

Agriculture's importance economic progress - Essay Example Agriculture which is predominantly the base of systems of economy in most of the under developed countries is the primary occupation of rural people in those countries. It is primary because it supplies basic necessities of human life, provides basic inputs for industries and, in addition to these, purveys goods for exports and other purposes. â€Å". . . the rise in agricultural production . . . makes important contributions to general economic development and that, within considerable limits at least, it is one of the preconditions which must be established before a take off into self sustained economic growth becomes possible† (Nicholls, 1970). Earlier development economists like Arthur Lewis (1954), Hirschman (1958) and Fei and Ranis (1961) have identified and analyzed how agriculture contributes to the overall economic growth of a country (Higgins, 1982). They highlighted that the ‘unlimited labor supply’ in the agricultural sector of an underdeveloped countr y can be transformed to industrial sector and the ability of agriculture to transfer its abundant resources to other sectors actually lead the economic growth of any country. Contribution of agriculture in an economy is judged by the value of the total quantity of output in the Net National Product (NNP). A ratio between the output of agricultural sector and the output of non-agricultural sector or the proportion of the former in the NNP furnishes reasonable evidence not only of the nature of economy but also its stage of development. Simon Kuznets (1961) observes that â€Å"an increase in the net output of the agriculture is, in and of itself, sum of the increases in the net products of the several sectors† (61). So long as the rate of growth of the non-agricultural sector is higher than that of the agricultural sector, the proportional contribution of agriculture in the total product will decline. His model for assessing the product contributions to the NNP quite explicit a nd it is delineated as follows: dP=A.a+O.o Where, A= Product of Agriculture; O = Product of all other sectors; P= Total Proudct =(A+O); a=rate of growth of A ; o=Rate of Growth of O; d= change. The increment in the total product is the aggregate of products of sectarian outputs as multiplied by their respective rates of growth. Role of Agriculture in Economic Development- Traditional approach The traditional and earlier approaches proposed by development economists like Lewis, Fie and Ranis highlighted the important roles of agriculture sector in the economic development of any country (Vogel, 1994). A fast track development of this sector is crucial for other sectors as well. Only a strong and efficient agricultural sector can feed the growing population of a country, provide employment, play vital role in the foreign trade and earning of foreign exchange and give a strong base to the industries. Because of these multifaceted functions of agriculture, it has got a multiplier effect on any country’s socio-economic and industrial scenario. Thus according to the traditional analysis the role of the agricultural sector is confined to the source of food, source of livelihood, role in foreign trade, capital/savings transfers and its role in industrial development (Stringer, 2001). Source of Lively hood Most of the developing countries depend on agriculture and allied activities for their livelihood. Agriculture provides immense employment opportunities to the masses and this assumes much significance when the growing working force does not come out of the yoke. The figure may be varied from 10 percent to 60 percent in the contemporary scenario generally prevailing in the developing and underdeveloped countries across the globe (Stringer, 2001). Importance in the context of food security The character and content of a country’s economic structure alongside the potential for its further growth and development are largely dependent not only upon the quan tity but also upon the type of its output generated and distributed in the economy (FAO, 2001). For example, an

Memories of Childhood Essay Example for Free

Memories of Childhood Essay Childhood is a golden period of mans life. It is the time when man is dependent but he enjoys all the comforts of the life. He has nothing to worry about. He has to do nothing to get his demand fulfill except weeping. It is a carefree time. In my childhood I was free from worries and sorrows. When every day and night brought joys for me. Parents tried to amuse me. They loved me so much that I began to think they were living only for me and it was not wrong as well. Near our house there was a pond. Father took me daily to the pond to enjoy the beautiful sight of the setting sun. Once my father fell ill and could not go to the pond. I was very fond of taking bath in the bright water of the pond but father did not allow me to fulfill my desire. Now it was a golden chance. I went alone to the pond and jumped into the water. Deep water took me into its lap. After this what happened I do no know. When I opened my eyes a doctor was bending over me. Mother and sisters were weeping. I had to remain for one month in the hospital. Now when I recall that horrible accident my heart begins to sink with fear. Then I decided not to do anything without the permission of parents. There is one more thing which I cannot help mentioning More over I can never forget the day when I was beaten by the gardener for stealing mangoes. My friend Maria and I went to the garden to eat mangoes. Maria was very active and clever. She remained out of the garden and asked me to climb up the mango tree. Consequently I was caught by the gardener and he bead me with his sharp stick. Maria ran away The gardener took me before my father and told the whole story. Father prohibited me from going to the garden. I was much ashamed but soon all it was over. If you have female companion you are fond of dolls as well. The same case was with me. I was very fond of dolls in my childhood. Maria and I played with the dolls for hours, marrying and decorating them. Mother did not like her daughter wasting time in playing. As a result she took me to the school. I was much frightened and puzzled among the strange girls. I began to weep bitterly. While I was weeping I felt a soft hand on my back it was my teacher. She consoled me and gave me a beautiful book of colorful pictures. I was taught by her to smile in the storm of tears and sufferings. Now she is far away from me but her memory is fresh in my mind and I will never forget her as well. Children usually keep on gamboling and playing . Sometimes they keep on running in childhood I was like a playful deer wandering through the meadows. Maria and wandered the whole day long in the green fields of our villages picking wild flowers and making garlands. How beautiful moonlit nights were in childhood! When the shining moon appeared we all played in the open fields catching one another. Now childhood is no more but it appears a beautiful dream.

Environmentalism Essay -- essays research papers

Evironmentalism: The Next Step Broad Social Change Through Personal Commitment Introduction In the last thirty years, America has witnessed an environmental revolution. New laws like the 1963 Clean Air Act and the 1974 Safe Drinking Water Act forged new ground in political environmentalism. Social phenomena like Earth Day, organized by Dennis Hayes in 1970, and the beginning of large-scale recycling, marked by Oregon's 1972 Bottle Bill, have help change the way Americans think about the environment. As we approach the third millennium, however, we must reconsider our place on the planet and reflect on our efforts and progress towards a sustainable society. As global warming becomes a scientific reality, natural disasters make monthly appearances in the headlines, and communities continue to find their ground-water contaminated by industrial and nuclear waste, we must ask ourselves: are we doing enough? The environmental movement in the past has largely been a social and political ph enomenon. While many of us recycle (yet still only 35 percent of us) and take dead batteries to our town's Hazardous Waste Day, most Americans have not made the environment a personal issue. Very few of us have taken the kind of personal life-changing steps that are necessary to create an environmentally sustainable society. It is simply naive to believe that America's present rates of consumption, waste production, and environmental contamination are sustainable. The kind of social change required can only happen when we as individuals embrace the effort in our everyday lives. Only then will corporate America and the government realize that they too must change to maintain their customer base and public support. This kind of personal commitment to change would also create a new social ethic based on the environment under which people and companies who do not care for the earth would be held socially and financially responsible. In six parts, this article will re-examine our place i n the environmental movement and investigate exactly what changes we can make in our personal lives to bring about positive change. These areas are transportation, energy, recycling and waste management, toxins and pollution, food, and water. Some of the changes discussed will require sacrifice. But, more important, these changes will often simplify our lives, bring our families and communities closer ... ...incing letter to your boss (if you're not the boss) might convince him or her that the amount of money saved in paper will eventually pay for the printer. When you go to the grocery store, bring your own bags instead of using paper or plastic. Consumers often wonder which of the two is better; the answer is: neither. When shopping for smaller items, tell the clerk not to give you a bag (frequently their default action) if you can simply carry the item in your hand. Buy durable, quality items that will last and lend themselves to repair when broken. When things do break, remember that fixing is almost always cheaper than replacing, and you'll have the satisfaction of minimizing your garbage output. When you no longer need something, give it away instead of throwing it away. Organizations like The Salvation Army will gladly accept almost any used household item. Remember that Benjamin Franklin's maxim, "A penny saved is a penny earned," goes for the environment, too. Ever y time we reuse something, we've saved another like it from having to be made. Every time we recycle something, we've saved energy, pollution, and the materials from being mined from our natural resources.

Toothpaste Market in China

(Excerpt) Research and Investment Forecast Evaluation of Toothpaste Market in China, 2011-2015 Research and Investment Forecast Evaluation of Toothpaste Market in China, 2011-2015 (Excerpt) Huidian Research Publication Date: May 2012 (Excerpt) Research and Investment Forecast Evaluation of Toothpaste Market in China, 2011-2015 11. Consumer Market Analysis of China’s Toothpaste Industry 11. 2 Target Consumer Group Research of Toothpaste Products 11. 2. 3 Consumer Views to Demanded Suitable Toothpaste Type Fig. 40 Demand of Suitable Toothpaste Type Types of Toothpaste Usage Number ConsumerType of ratio Herbaceous Type 85 35% Whitening Type 109 44% Chinese Herbal Medicine Type 44 18% Other Types 8 3% Source: Huidian Research It can be seen from the table above, the most needed type of toothpaste is the whitening type. This shows that consumers pay great attention to vigorous and graceful. In today’s society, image is a very important project, so teeth whitening became a ho t topic gradually. It is easy to see that with the development of society, people pay more and more attention to their images. Teeth are also a part of image and tooth whiting becomes a concern issue, too.Therefore, the whitening toothpaste has become the pursuit of consumers. Table of Contents Chapter I. Status Quo of Industrial Development 1. Overview of Toothpaste Industry 1. 1 Definition and Classification 1. 1. 1 Definition 1. 1. 2 Characteristic 1. 2 Maturity Grade Analysis of Global Toothpaste Industrial Development 1. 2. 1 Market Maturity Grade Comparison between Home and Abroad 1. 2. 2 Maturity Grade Analysis of Toothpaste Industry and Sub-industries 2. Development of Global Toothpaste Industry 2. 1 Analysis of Global Toothpaste Market 2. 2 Characteristics of Toothpaste Market in Major Countries . Development Status Quo of China’s Toothpaste Industry 3. 1 Development Status Quo of China’s Toothpaste Industry 3. 1. 1 Development Status Quo of Toothpaste Industr ial Brand (Excerpt) Research and Investment Forecast Evaluation of Toothpaste Market in China, 2011-2015 3. 1. 2 Status Quo of Toothpaste Industrial Consumer Market 3. 1. 3 Consumption Level of Toothpaste Market 3. 2 Development Situation of Toothpaste Industry from 2009 to 2011 3. 3 Operation of Toothpaste Industry from 2009 to 2011 3. 1. 1 Profit of Toothpaste Industry from 2010 to 2011 3. 1. Production and Marketing of Toothpaste Industry from 2010 to 2011 3. 4 Analysis and Thinking about China’s Toothpaste Market 4. Research on China’s Toothpaste Market Development 4. 1 Research on China’s Toothpaste Market Development in 2010 4. 2 Market Situation of China’s Toothpaste Industry in 2011 4. 3 Development Characteristic of China’s Toothpaste Market in 2012 5. Consumer Survey of China’s Toothpaste Market 5. 1 Consumer Survey of China’s Toothpaste Market Consumption in 2010 5. 1. 1 Overall Market Share 5. 1. 2 Marker Share in Key Citi es 5. 1. 3 Used Rate Analysis 5. 1. 4 Toothpaste Types in Use . 1. 5 Toothpaste Using Quantity within Half a Year (150g Pack) 5. 1. 6 Purchasing Place 5. 2 Characteristic Research on China’s Toothpaste Users in 2010 5. 2. 1 Characteristics of Colgate Toothpaste’s Users 5. 2. 2 Characteristics of Crest Toothpaste’s Users 5. 2. 3 Characteristics of Zhonghua Toothpaste’s Users 5. 2. 4 Characteristics of Darlie Toothpaste’s Users 5. 2. 5 Characteristics of Yunnan Baiyao Toothpaste’s Users 5. 2. 6 Characteristics of LG Bamboo Salt Toothpaste’s Users 5. 2. 7 Characteristics of Amway Glister Toothpaste’s Users 6. Economic Operation Analysis of Toothpaste Industry . 1 Analysis of Toothpaste Output from 2010 to 2011 6. 2 Main Economic Indicator Analysis of Toothpaste Industry from 2010 to 2011 6. 3 Analysis of China’s Toothpaste Industrial Performance from 2010 to 2011 6. 3. 1 Analysis of Industrial Profitability from 2010 to 201 1 6. 3. 2 Analysis of Industrial Operation Capability from 2010 to 2011 6. 3. 3 Analysis of Industrial Solvency from 2010 to 2011 6. 3. 4 Analysis of Industrial Growth Capability from 2010 to 2011 7. Import and Export of China’s Toothpaste Industry 7. 1 Import Analysis of China’s Toothpaste Industry from 2010 to 2011 7. Export Analysis of China’s Toothpaste Industry from 2010 to 2011 8. Development Analysis of Toothpaste Market Segment (Excerpt) Research and Investment Forecast Evaluation of Toothpaste Market in China, 2011-2015 8. 1 Traditional Chinese Medicine Toothpaste 8. 1. 1 Analysis of Industrial Development Status Quo from 2010 to 2011 8. 1. 2 Analysis of Market Scale from 2010 to 2011 8. 1. 3 Analysis of Industrial Development Strategy from 2010 to 2011 8. 2 Fluoride Toothpaste 8. 2. 1 Introduction 8. 2. 2 New Standards 8. 2. 3 Limit of Fluorine Content in Children’s Toothpaste 8. 3 Salty Toothpaste 8. 3. 1 Development Status . 3. 2 Salty Toothpa ste became the First Choice of Consumers 9. Development Analysis of Relevant Industries 9. 1 Toothbrush 9. 1. 1 Analysis of Toothbrush Market 9. 1. 2 Analysis of Electric Toothbrush Market Opportunity 9. 1. 3 Development Trend of Toothbrush Industry 9. 2 Mouthwash 9. 2. 1 Introduction 9. 2. 2 Mouthwash Brand 9. 2. 3 Introduction of Consumption Status 10. Regional Market Analysis of China’s Toothpaste Industry 10. 1 North China 10. 2 Northeast Region 10. 3 Eastern China 10. 4 South China 10. 5 Central China 10. 6 Western China 11. Consumer Market Analysis of China’s Toothpaste Industry 11. Income Analysis of China’s Toothpaste Consumer 11. 1. 1 Analysis of China’s Population and People’s Livelihood 11. 1. 2 Analysis of Consumer Income Level from 2010 to 2011 11. 1. 3 Analysis of Consumer Confidence Index in 2011 11. 2 Research on Target Consumer Group of Toothpaste Products 11. 2. 1 Consumer Views to Toothpaste Prices 11. 2. 2 Consumer Views to Toot hpaste Demanded Functions 11. 2. 3 Consumer Views to Demanded Suitable Toothpaste Type 11. 3 Factors Affecting Consumer Behavior 11. 3. 1 Social Productive Force 11. 3. 2 Consumers’ Income and Commodity Price 11. 3. 3 Personal Preference 1. 3. 4 National Tradition (Excerpt) Research and Investment Forecast Evaluation of Toothpaste Market in China, 2011-2015 11. 3. 5 Individual Character and Self-concept Chapter II. Industrial Competitive Structure 12. Competitive Structure Analysis of Toothpaste Industry 12. 1 Analysis of Industrial Competitive Structure 12. 2 Analysis of Industrial Concentration Degree 12. 2. 1 Analysis of Market Concentration Degree 12. 2. 2 Analysis of Enterprise Concentration Degree 12. 3 Overview of Competitive Structure in China’s Toothpaste Industry 12. 4 Research of Toothpaste Brands in 2010 12. Competitive Structure Analysis of Toothpaste Industry from 2010 to 2011 13. Competitive Strategy Analysis of Toothpaste Enterprises 13. 1 Competitive S trategy Analysis of Toothpaste Market 13. 1. 1 Product Upgrade 13. 1. 2 Focus on Channel Construction 13. 1. 3 Brand Construction 13. 2 Competitive Strategy Analysis of Toothpaste Enterprises 13. 2. 1 Foreign Capital 13. 2. 2 Native Capital 13. 2. 3 Other Kinds of Capital 14. Competitive Analysis of Foreign Key Toothpaste Enterprises 14. 1 Colgate-Palmolive Company 14. 1. 1 Company Profile 14. 1. 2 Analysis of Competitive Advantages 14. 1. Operation Situation 14. 1. 4 Development Strategy from 2012 to 2015 14. 2 Procter & Gamble (P&G) 14. 2. 1 Company Profile 14. 2. 2 Analysis of Competitive Advantages 14. 2. 3 Operation Situation from 2012 to 2015 14. 2. 4 Development Strategy from 2012 to 2015 14. 3 Unilever 14. 3. 1 Company Profile 14. 3. 2 Analysis of Competitive Advantages 14. 3. 3 Operation Situation from 2012 to 2015 14. 3. 4 Development Strategy from 2012 to 2015 14. 4 LG Household & Health Care 14. 4. 1 Company Profile 14. 4. 2 Analysis of Competitive Advantages 14. 4. 3 Op eration Situation from 2012 to 2015 14. 4. Development Strategy from 2012 to 2015 (Excerpt) Research and Investment Forecast Evaluation of Toothpaste Market in China, 2011-2015 15. Competitive Analysis of Key Toothpaste Enterprises 15. 1 Guangzhou Masson Share Co. Ltd. 15. 1. 1 Company Profile 15. 1. 2 Analysis of Competitive Situation 15. 1. 3 Development Strategy from 2012 to 2015 15. 2 Liuzhou LMZ Co. , Ltd. 15. 2. 1 Company Profile 15. 2. 2 Analysis of Competitive Advantages 15. 2. 3 Operation Situation from 2010 to 2011 15. 2. 4 Development Strategy from 2012 to 2015 15. 3 Yunnan Baiyao Group Co. , Ltd. 15. 3. 1 Company Profile 15. . 2 Sales Mode 15. 3. 3 Operation Situation from 2010 to 2011 15. 3. 4 Development Strategy from 2012 to 2015 15. 4 Nice Group 15. 4. 1 Company Profile 15. 4. 2 Operation Situation from 2010 to 2011 15. 4. 3 Development Strategy from 2012 to 2015 15. 5 Dencare (Chongqing) Oral Care Co. , Ltd. 15. 5. 1 Company Profile 15. 5. 2 Analysis of Competitive Advantages 15. 5. 3 Shortage of Dencare 15. 6 Haolai Chemical (zhongshan) Co. , Ltd. 15. 6. 1 Company Profile 15. 6. 2 Analysis of Competitive Advantages 15. 6. 3 Development Strategy from 2012 to 2015 Chapter III. Forecast of Industrial Prospect 6. Analysis of Toothpaste Industrial Development Trend 16. 1 Prospect and Opportunity Analysis of China’s Toothpaste Industry 16. 2 Development Trend Analysis of China’s Toothpaste Market from 2012 to 2015 16. 2. 1 Product Aspect 16. 2. 2 Price Aspect 16. 2. 3 Channel Aspect 16. 2. 4 Promotion Aspect 16. 2. 5 Packaging Aspect 16. 2. 6 Spread Aspect 17. Forecast of Toothpaste Industrial Development 17. 1 Forecast of Demand and Consumption (Excerpt) Research and Investment Forecast Evaluation of Toothpaste Market in China, 2011-2015 17. 1. 1 Forecast of Market Scale from 2012 to 2015 17. 1. Forecast of Industrial Gross Output Value from 2012 to 2015 17. 1. 3 Forecast of Industrial Sales Revenue from 2012 to 2015 17. 1. 4 Forecas t of Industrial Total Assets from 2012 to 2015 17. 2 Demand and Supply Forecast of China’s Toothpaste Industry 17. 2. 1 Supply Forecast from 2010 to 2015 17. 2. 2 Demand Forecast from 2012 to 2015 17. 2. 3 Supply and Demand Balance Forecast from 2012 to 2015 Chapter IV. Research of Investment Strategy 18. Investment Status Quo Analysis of Toothpaste Industry 18. 1 Investment Status Analysis of Toothpaste Industry in 2010 18. 1. 1 Investment Status by Registration in 2010 18. 1. Investment Status of Small-sized, Medium-sized and Large-sized Enterprises in 2010 18. 1. 3 Investment Status by Holding Type in 2010 18. 2 Investment Status Analysis of Toothpaste Industry in 2011 18. 2. 1 Investment Status by Registration in 2011 18. 2. 2 Investment Status of Small-sized, Medium-sized and Large-sized Enterprises in 2011 18. 2. 3 Investment Status by Holding Type in 2011 19. Investment Environment Analysis of Toothpaste Industry 19. 1 Analysis of Economic Development Environment 19. 2 Analysis of Policy, Laws and Regulations Environment 20. Investment Opportunity and Risk of Toothpaste Industry 0. 1 Comparison and Analysis of Industrial Activity Coefficient 20. 2 Comparison and Analysis of the Rate of Return on Investment 20. 3 Return on Investment Forecast of Toothpaste Industry from 2012 to2015 20. 4 Analysis of Investment Risk and Control Strategy 21. Research of Toothpaste Industrial Investment Strategy 21. 1 Research of Development Strategy 21. 2 Strategic Thinking of China’s Toothpaste Brands 21. 1. 1 Significance of Enterprise Brands 21. 1. 2 Meaning of Brand Strategy Implement 21. 1. 3 Status Quo Analysis of Toothpaste Brands 21. 1. 4 Brand Strategy of China’s Toothpaste Enterprises 1. 1. 5 Strategic Management Strategy of Toothpaste Brands 21. 3 Operation and Management Strategies of Toothpaste Enterprises 21. 3. 1 Grasp the Market Demand 21. 3. 2 Establish a Wide Network and Convenience for Purchase (Excerpt) Research and Investment Forec ast Evaluation of Toothpaste Market in China, 2011-2015 21. 3. 3 Stimulate Consumption and Create Demand 21. 3. 4 Focus on Product Brands 21. 3. 5 Control Product Quality 21. 3. 6 Strengthen Management and Controlling Force 21. 3. 7 Strengthen the Advertising Promotion 21. 4 Research of Toothpaste Industry Investment Strategy

History of Psychology Essay

Modern psychology is a science that it continually being researched and added to. Psychology predates the 19th century and includes roots into early philosophy. Looking closely one can identify philosophers that related to the beginnings of psychology, identify major philosophers that historically relate to the beginnings psychology as a formal discipline and how the development of the science of psychology changed during the 19th century. A philosopher that could easily be called the father of modern psychology would be: Rene Descartes. Descartes was a philosopher in the 17th century that stepped outside the limits and wanted to know more. Descartes came up with 4 basic rules to arrive at the truth of whatever he was researching. These rules were basically to think clearly, logically and without bias (Goodwin, 2008). Descartes had several derived ideas and was considered a nativist and a rationalist. These ideas that he created foreshadowed one of psychology’s major topics of nature versed nurture. Descartes also fought that there was a difference between a person’s mind and body; and this difference separated us from animals. Before Descartes died he published his last of many books called: The Passions of the Soul. This book established him as a psychologist and a physiologist (Goodwin, 2008). This book emphasized on human emotions and continued on with a discussion about mind and body distinctions. He Clarified the body is a machine and responds to curtain motions, such as fear, that trigger reflexes. Descartes also determined that the pineal glad in the brain was the gland that sent messages from the mind/spirit to the body. Descartes died at just before his 54th birthday in 1650. There were several philosophers that historically relate to the beginnings psychology as a formal discipline. John Locke, George Berkeley, David Hume and John Stuart Mill are just a few to mention. Each philosopher contributed an aspect to psychology that led to its formal discipline. John Locke refused to believe in an innate mind and believed that mind is created by experiences and was not pre programmed. He stated believed that the ideas that come from our minds are due to ones sensations and reflections from experiences (Goodwin, 2008). George Berkeley added an analysis of visual perception. He disagreed with Locke’s theory of primary and secondary distinctions, but stated that our belief in God gave us a type of reality. David Hume is known for his study of impressions. This study helped research sensations and ideas the thought were due to impressions. Hume also identified the rules of association as resemblance, contiguity and cause/effect (Goodwin, 2008). There are a couple of reasons that psychology changed dramatically in the 19th century. John Stuart Mill was a big part of that change. Even though John Stuart Mill was a very young philosopher, he studied the logic of science and analyzed several methods on how to get a scientific truth. For example, Mill would look in to different genes that could produce depression. Every depressed person that he would look at would have this gene; however that did not mean that if you had the gene that you automatically had depression. In modern times we call his methods the experimental method and the correlation method. These types of methods are use today in the field of psychology. Philosophers are a big part of the modern world of psychology. They helped introduce methods that are still used today and added science to the study. Without philosophers we may still believe that the mind and body are one and that genes create thoughts and ideas and not experiences. We would not understand how visual and sensations react and create thoughts and different experiences. Philosopher Hermann Ebbinghaus once said that â€Å"Psychology has a long past, yet its real history is short† (Goodwin, 2008). This statement represents the fact that psychology is only 100 years old, but can be predated back from the time humans started asking questions. References Goodwin, C. J. (2008). A History of Modern Psychology (3rd ed. ).