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A. D. Roy
Andrew Donald Roy (28 June 1920 – 12 March 2003) was a British economist who is known for the Roy model of self-selection and income distribution and Roy's safety-first criterion. Early life and education Andrew Donald Roy was born 28 June 1920. His father, Donald Whatley Roy, was a physician. A. D. Roy began studies in mathematics at Sidney Sussex College, Cambridge Sidney Sussex College (referred to informally as "Sidney") is a constituent college of the University of Cambridge in England. The College was founded in 1596 under the terms of the will of Frances Sidney, Countess of Sussex (1531–1589), wife ..., in 1938. He won the distinguished Tripos award in 1939 in mathematics. His studies were interrupted by the outbreak of World War II, and he eventually served in the Fourteenth Army in India. He fought in the Battle of Imphal which stemmed the Japanese invasion of India in 1944. During his service, Roy contracted jaundice and suffered a nervous collapse, whic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
London
London is the capital and largest city of England and the United Kingdom, with a population of just under 9 million. It stands on the River Thames in south-east England at the head of a estuary down to the North Sea, and has been a major settlement for two millennia. The City of London, its ancient core and financial centre, was founded by the Romans as '' Londinium'' and retains its medieval boundaries.See also: Independent city § National capitals The City of Westminster, to the west of the City of London, has for centuries hosted the national government and parliament. Since the 19th century, the name "London" has also referred to the metropolis around this core, historically split between the counties of Middlesex, Essex, Surrey, Kent, and Hertfordshire, which largely comprises Greater London, governed by the Greater London Authority.The Greater London Authority consists of the Mayor of London and the London Assembly. The London Mayor is distinguished fr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Economics
Economics () is the social science that studies the Production (economics), production, distribution (economics), distribution, and Consumption (economics), consumption of goods and services. Economics focuses on the behaviour and interactions of Agent (economics), economic agents and how economy, economies work. Microeconomics analyzes what's viewed as basic elements in the economy, including individual agents and market (economics), markets, their interactions, and the outcomes of interactions. Individual agents may include, for example, households, firms, buyers, and sellers. Macroeconomics analyzes the economy as a system where production, consumption, saving, and investment interact, and factors affecting it: employment of the resources of labour, capital, and land, currency inflation, economic growth, and public policies that have impact on glossary of economics, these elements. Other broad distinctions within economics include those between positive economics, desc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
University Of Cambridge
, mottoeng = Literal: From here, light and sacred draughts. Non literal: From this place, we gain enlightenment and precious knowledge. , established = , other_name = The Chancellor, Masters and Scholars of the University of Cambridge , type = Public research university , endowment = £7.121 billion (including colleges) , budget = £2.308 billion (excluding colleges) , chancellor = The Lord Sainsbury of Turville , vice_chancellor = Anthony Freeling , students = 24,450 (2020) , undergrad = 12,850 (2020) , postgrad = 11,600 (2020) , city = Cambridge , country = England , campus_type = , sporting_affiliations = The Sporting Blue , colours = Cambridge Blue , website = , logo = University of Cambridge logo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Roy's Safety-first Criterion
Roy's safety-first criterion is a risk management technique, devised by A. D. Roy, that allows an investor to select one portfolio rather than another based on the criterion that the probability of the portfolio's return falling below a minimum desired threshold is minimized. For example, suppose there are two available investment strategies—portfolio A and portfolio B, and suppose the investor's threshold return level (the minimum return that the investor is willing to tolerate) is −1%. Then, the investor would choose the portfolio that would provide the maximum probability of the portfolio return being at least as high as −1%. Thus, the problem of an investor using Roy's safety criterion can be summarized symbolically as: \underset\Pr(R_<\underline) where is the probability of (the actual return of asset i) being less than (the minimum acceptable return). Normally distributed return and SFRatio If the portfolios under consideratio ...[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Roy Model
The Roy model is one of the earliest works in economics on self-selection due to A. D. Roy. The basic model considers two types of workers that choose occupation in one of two sectors. Original model Roy's original paper deals with workers selecting into fishing and hunting professions, where there is no uncertainty about the amount of goods (fish or rabbits) that will be caught in a given period, but fishing is more costly as it requires more skill. The central question that Roy tries to answer in the original paper is whether the best hunters will hunt and the best fishermen will fish. While the discussion is non-mathematical, it is observed that choices will depend on the distribution of skills, the correlation between these skills in the population, and the technology available to use these skills. Further developments George Borjas was the first to formalize the model of Roy in a mathematical sense and apply it to self-selection in immigration. Specifically, assume source coun ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Donald Whatley Roy
Donald Whatley Roy (22 May 1881 – 9 December 1960) was a British obstetrician and gynaecologist at St George's Hospital, London. Early life and education He was born at Appleton Roebuck on 22 May 1881, the son of the Rev. James Roy. He attended Sidney Sussex College, Cambridge. He won a university scholarship to St. George's Hospital, qualifying in medicine in 1906 and graduating (M.B., B.Ch.) in 1907. He became a Fellow of the Royal College of Surgeons of England on 8 June 1908. Military career When World War I broke out, he served as a Navy surgeon in the Grand Fleet with the Royal Naval Volunteer Reserve. He then transferred to the Royal Army Medical Corps The Royal Army Medical Corps (RAMC) is a specialist corps in the British Army which provides medical services to all Army personnel and their families, in war and in peace. The RAMC, the Royal Army Veterinary Corps, the Royal Army Dental Corps a ..., serving as temporary major at the Northampton War Hospital fr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sidney Sussex College, Cambridge
Sidney Sussex College (referred to informally as "Sidney") is a constituent college of the University of Cambridge in England. The College was founded in 1596 under the terms of the will of Frances Sidney, Countess of Sussex (1531–1589), wife of Thomas Radclyffe, 3rd Earl of Sussex, and named after its foundress. It was from its inception an avowedly Protestant foundation;Sidney Sussex College website; history "some good and godlie moniment for the mainteynance of good learninge". In her will, Lady Frances Sidney left the sum of £5,000 together with some plate to found a new College at Cambridge University "to be called the Lady Frances Sidney Sussex College". Her executors [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
World War II
World War II or the Second World War, often abbreviated as WWII or WW2, was a world war that lasted from 1939 to 1945. It involved the vast majority of the world's countries—including all of the great powers—forming two opposing military alliances: the Allies and the Axis powers. World War II was a total war that directly involved more than 100 million personnel from more than 30 countries. The major participants in the war threw their entire economic, industrial, and scientific capabilities behind the war effort, blurring the distinction between civilian and military resources. Aircraft played a major role in the conflict, enabling the strategic bombing of population centres and deploying the only two nuclear weapons ever used in war. World War II was by far the deadliest conflict in human history; it resulted in 70 to 85 million fatalities, mostly among civilians. Tens of millions died due to genocides (including the Holocaust), starvation, ma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fourteenth Army (United Kingdom)
The British Fourteenth Army was a multi-national force comprising units from Commonwealth of Nations, Commonwealth countries during the World War II, Second World War. As well as British Army units, many of its units were from the British Indian Army, Indian Army and there were also significant contributions from British Army's West Africa, West and East African divisions. It was often referred to as the "Forgotten Army" because its operations in the Burma Campaign were overlooked by the contemporary press, and remained more obscure than those of the corresponding formations in Europe for long after the war. For most of the Army's existence, it was commanded by Lieutenant-general (United Kingdom), Lieutenant-General William Slim, 1st Viscount Slim, William Slim. History Creation The army was formed in 1943 in eastern India. With the creation of South East Asia Command in late 1943, the Eastern Army which formerly controlled operations against the Imperial Japanese Army, Japanese ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Battle Of Imphal
) , partof = the Operation U-Go during the Burma Campaign in the South-East Asian theatre of World War II , image = Imphalgurkhas.jpg , image_size = 300 , caption = Gurkhas advancing with Grant tanks to clear the Japanese from Imphal-Kohima road in North Eastern British India , date = 8 March – 3 July 1944 , place = Imphal, Manipur, India , coordinates = , result = British Indian victory , combatant1 = British Empire * India , combatant2 = Japan , commander1 = William Slim Geoffry Scoones Jack Baldwin , commander2 = Masakasu Kawabe Renya Mutaguchi Subhas C. Bose , strength1 = 4 Infantry Divisions1 Armoured Brigade1 Parachute Brigade , strength2 = 3 Infantry Divisions1 Tank Regiment2 Indian regiments , casualties1 = 12,603 killed and woundedLouis Allen, ''Burma: The Longest War'', p. 638 , casualties2 = 54,879 ki ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Econometrica
''Econometrica'' is a peer-reviewed academic journal of economics, publishing articles in many areas of economics, especially econometrics. It is published by Wiley-Blackwell on behalf of the Econometric Society. The current editor-in-chief is Guido Imbens. History ''Econometrica'' was established in 1933. Its first editor was Ragnar Frisch, recipient of the first Nobel Memorial Prize in Economic Sciences in 1969, who served as an editor from 1933 to 1954. Although ''Econometrica'' is currently published entirely in English, the first few issues also contained scientific articles written in French. Indexing and abstracting ''Econometrica'' is abstracted and indexed in: * Scopus * EconLit * Social Science Citation Index According to the ''Journal Citation Reports'', the journal has a 2020 impact factor of 5.844, ranking it 22/557 in the category "Economics". Awards issued The Econometric Society aims to attract high-quality applied work in economics for publication in ''Eco ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1920 Births
Nineteen or 19 may refer to: * 19 (number), the natural number following 18 and preceding 20 * one of the years 19 BC, AD 19, 1919, 2019 Films * ''19'' (film), a 2001 Japanese film * ''Nineteen'' (film), a 1987 science fiction film Music * 19 (band), a Japanese pop music duo Albums * ''19'' (Adele album), 2008 * ''19'', a 2003 album by Alsou * ''19'', a 2006 album by Evan Yo * ''19'', a 2018 album by MHD * ''19'', one half of the double album ''63/19'' by Kool A.D. * ''Number Nineteen'', a 1971 album by American jazz pianist Mal Waldron * ''XIX'' (EP), a 2019 EP by 1the9 Songs * "19" (song), a 1985 song by British musician Paul Hardcastle. * "Nineteen", a song by Bad4Good from the 1992 album '' Refugee'' * "Nineteen", a song by Karma to Burn from the 2001 album ''Almost Heathen''. * "Nineteen" (song), a 2007 song by American singer Billy Ray Cyrus. * "Nineteen", a song by Tegan and Sara from the 2007 album '' The Con''. * "XIX" (song), a 2014 song by Slip ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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