Η παρούσα μελέτη εξετάζει τη δυναμική σχέση μεταξύ των τιμών των ζωοτροφών και παραγωγού, καταναλωτή για τέσσερα είδη κρέατος: μοσχάρι, χοιρινό, αρνί και κοτόπουλο. Η σχετική βιβλιογραφία δείχνει ότι πολλοί παράγοντες επιδρούν στις τιμές των αγροτικών προϊόντων αλλά οι τιμές των ζωοτροφών είναι ο κυριότερος. Αυτό συμβαίνει γιατί οι ζωοτροφές αποτελούν πρώτη ύλη για την παραγωγή κρέατος και κατ΄επέκταση θα επηρέασουν τις τιμές παραγωγού και καταναλωτή. Τα δεδομένα αποτελούνται από 279 μηνιαίες τιμές που εκτείνονται από τον Ιανουάριο 1990 έως τον Ιανουάριο 2013. Χρησιμοποιώντας Johansen cointegration tests, Granger causality tests και impulse response functions τα εμπειρικά αποτελέσματα επιβεβαιώνουν πως οι τιμές των ζωοτροφών, οι τιμές παραγωγού και οι τιμές καταναλωτή δεν είναι ανεξάρτητες μεταξύ τους. / The present paper studies the relationship among feed prices, producer prices and consumer prices of meat: beef, pork, poultry and lamb. The literature indicates that there are many factors which affect agricultural commodity prices but the feed prices are the main. This is why feed has a principal role in the production of meat and will affect producer and consumer prices. The data consists of 279 monthly observations extending from January 1990 to January 2013. Using Johansen cointegration tests, Granger causality tests and impulse response functions, the empirical findings confirm that feed prices, consumer prices and producer prices are interdependent.

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Submitted by FABIANO ZIMMERMANN (fabpenna@yahoo.com.br) on 2016-02-26T20:45:13Z No. of bitstreams: 1 Fabiano Zimmermann versao final.pdf: 445367 bytes, checksum: 653eae70f4eb404f167fdab5a327da7d (MD5) / Approved for entry into archive by Renata de Souza Nascimento (renata.souza@fgv.br) on 2016-02-26T20:47:44Z (GMT) No. of bitstreams: 1 Fabiano Zimmermann versao final.pdf: 445367 bytes, checksum: 653eae70f4eb404f167fdab5a327da7d (MD5) / Made available in DSpace on 2016-02-26T20:56:05Z (GMT). No. of bitstreams: 1 Fabiano Zimmermann versao final.pdf: 445367 bytes, checksum: 653eae70f4eb404f167fdab5a327da7d (MD5) Previous issue date: 2016-02-02 / O estudo busca identificar quais variáveis são as mais relevantes para previsão da taxa de câmbio real efetiva e analisar a robustez dessas previsões. Foram realizados testes de cointegração de Johansen em 13 variáveis macroeconômicas. O banco de dados utilizado são séries trimestrais e os testes foram realizados sobre as séries combinadas dois a dois, três a três e quatro a quatro. Utilizando esse método, encontramos modelos que cointegravam entre si, para os países analisados. A partir desses modelos, foram feitas previsões fora da amostra a partir das últimas 60 observações. A qualidade das previsões foi avaliada por meio dos testes de Erro Quadrático Médio (EQM) e Modelo do Conjunto de Confiança de Hansen (MCS) utilizando um modelo de passeio aleatório do câmbio real como benchmark. Todos os testes mostram que, à medida que se aumenta o horizonte de projeção, o passeio aleatório perde poder preditivo e a maioria dos modelos são mais informativos sobre o futuro da taxa de câmbio real efetivo. / This paper seeks to identify which variables are the most relevant for predicting the real effective exchange rate and analyze the robustness of these forecasts. Johansen Cointegration tests were performed on 13 macroeconomic variables. The database quarterly series are used and tests were carried out on the combined sets two by two, three by three and four by four. Using this method, we find models that cointegrated each other, for the countries analyzed. From these models, predictions were made out of the sample from the last 60 observations. The quality of the forecasts was assessed by the mean square error tests (RMSE) and Model Hansen Confidence Set (MCS) used a random walk model the real exchange rate as a benchmark. All tests show that, as we expand the forecast horizon, the random walk lose predictive power and most models are more informative about the future of the real effective exchange rate in the long term.

Thesis (M.Sc. (Agricultural Economics)) -- University of Limpopo, 2022 / Agricultural production measures the performance and efficiency of a country’s agricultural sector. The state of agricultural production can be assessed through the value of agricultural production, which is a product of agricultural gross production and output prices in monetary terms. The study examines the relationship between the value of agricultural production, government spending on agriculture, and other selected variables. Annual data for the value of agricultural production, government expenditure in agriculture, consumer price index, average annual rainfall, food import value, and population from 1983 to 2019 were collected from different sources and were used in the analysis for this study. The Johansen cointegration test was used to determine the existence of a long-run relationship between the value of agricultural production and selected variables by using both the trace and eigenvalue tests. The results indicated that there is a long run relationship among the variables. The study further used the Granger causality test to check the causality between the value of agricultural production and government expenditure in agriculture. The results show that there is no causal effect between the two variables. Lastly, the study used a Vector autoregressive (VAR) model to determine the relationship between the value of agricultural production and selected variables. The results of the VAR model indicated that government expenditure on agriculture, average annual rainfall, food import value, and population positively affect the value of agricultural production. The study also found that the consumer price index negatively affects the value of agricultural production. The study recommends that the government increase its spending on the agricultural sector, which could be in the form of research investment in technologies such as climate-smart agricultural technologies. Additionally, the study recommends that policymakers should review the monetary policy of South Africa to ensure price stability and prevent inflation. Lastly, the study recommends that the South African government should discourage imports and encourage South African agricultural producers to produce more major imported food products.

This thesis provides a thorough analysis of the covered- and uncovered interest parity conditions (CIP, UIP) as well as the forward rate unbiasedness hypothesis (FRUH) for Sweden and the European Economic and Monetary Union (EMU). By studying data on interbank rates in Sweden (STIBOR) and the EMU (EURIBOR) as well as the corresponding spot- and forward exchange rates, monetary integration and country-specific risks are determined and analyzed with direct applications to the potential entry of Sweden into the EMU. As interest rate parity in general gives insight into market efficiency and frictions between the chosen regions, such points are discussed in addition to EMU entry. Drawing on past studies that mainly studied one condition in isolation, a nested formulation of interest rate parity is instead derived and tested using cointegration and robust estimation methods. The results point to a strict rejection of the FRUH for all horizons except the shortest and a case where CIP only holds for the 6-month horizon and partially over one year. This implies, based on the nested formulation, that UIP is rejected for all horizons as well. Ultimately, the study concludes that a Swedish entry into the EMU is not motivated given the lackluster results on UIP and due to the lack of monetary integration. / Den här uppsatsen presenterar en djupgående analys av det kurssäkrade- och icke-kurssäkrade ränteparitetsvillkoret samt den effektiva marknadshypotesen på valutaterminer för Sverige och den europeiska ekonomiska och monetära unionen (EMU). Genom att studera data på interbankräntor i Sverige (STIBOR) och EMU (EURIBOR) samt respektive spot- och valutaterminskurser så skattas och analyseras monetär integration samt landsspecifika risker med en direkt tillämpning på Sveriges eventuella inträde i EMU. Eftersom ränteparitet generellt ger insikt i marknadseffektivitet och friktioner regioner emellan, diskuteras även dessa punkter utöver ett eventuellt EMU-inträde. Genom att bygga på föregående studier som i huvudsak studerar ränteparitetsvillkoren var för sig, härleds en sekventiell formulering av villkoren som sedan testas med kointegration och robusta estimeringsmetoder. Resultaten ger att den effektiva marknadshypotesen strikt förkastas på alla tidshorisonter förutom på en dag respektive en vecka, samt att kurssäkrad ränteparitet håller på 6 och delvis 12 månaders sikt. Baserat på den sekventiella formuleringen så innebär detta att icke-kurssäkrad ränteparitet inte håller på någon tidshorisont. Slutligen, baserat på både resultat och diskussion, är ett svenskt inträde i EMU inte motiverbart givet negativa resultat för icke-kurssäkrad ränteparitet och avsaknaden av fullständig monetär integration mellan regionerna.

摘 要 本研究探討證交所實施盤中撮合取消兩檔限制、盤中瞬間價格穩定措施、收盤改採五分鐘集合競價、揭露未成交五檔的買賣委託價量等措施後，是否對期貨市場的績效指標，包括流動性、波動度與市場效率等產生變化，亦即考量台灣交易制度與市場結構與國外的差異性後，市場間是否存有外溢現象(spillovers)；此外，本研究亦檢視期貨對現貨的領先關係是否隨著現貨市場的交易限制減少及市場透明度增加而出現變化，本研究劃分研究期間為五個區段，分別是91年4月1日 ~ 91年6月30日、91年7月1日 ~ 91年7月26日、91年7月29日 ~ 91年9月30日、91年7月1日 ~ 91年9月30日與92年1月1日 ~ 92年4月09日，以探討這些新措施本研究的主要發現與研究結論如下： 1. 市場成交量與波動度均出現先增後減的現象，在假設總體經濟情勢無重大變化的前提下，現貨市場制度改革會對期貨市場造成影響，適度的透明度有助於提高市場一般流動性交易者的交易動機，但當市場的透明度提高到某一種程度時，反而會降低資訊內部人在公開市場的交易意願。 2. 傳統流動比率(ALR)與變異數比率在研究期間不存有顯著差異，顯示現貨市場的制度改革，並未對期貨市場的整體市場效率帶來改變。 3. 在領先落後關係上，期貨市場受現貨市場的影響力逐期減小，主要有以下可能解釋，分別是衝擊市場訊息屬於全面性(market wide)，台灣現貨市場有平盤以下不得放空的規定限制現貨市場對壞消息的反應能力、期貨市場自從開市以來就已有揭露最佳未成交五檔買賣價量資訊的措施、以及現貨市場後期由於缺乏這些資訊內部人的參與而使其對新資訊的反應仍然不如期貨市場快速。 4. 現貨市場受期貨市場的影響呈現先增後減，表示投資人在制度實施初期對新制度尚不熟悉，導致現貨市場出現短暫無效率的現象，但在2003年1月的揭示未成交最佳五檔買賣價量制度實施後，現貨市場變的更加透明化，使其對期貨市場前期新資訊的依賴程度已大幅減少。 5. 期交所於2002 / 07 / 29更改盤中之撮合方式，將由原本每十秒集合競價撮合一次之方式改為逐筆撮合，對期貨的市場市場並未造成顯著特殊的影響。 關鍵字：外溢效果、領先落後、交易制度改革、市場績效指標、VECM-GARCH、衝擊反應函數、Granger因果關係檢定、Johansen共整合 / Abstract The Taiwan Stock Exchange adopted four main trading mechanisms. (elimination of the two up/down tick, intra-day volatility interruption, 5-min closing call auction, and disclosure of the best five bid/ask price and volume) This paper investigates the spillover effects on TAIFEX after considering the special market microstructure and trading systems in Taiwan. The major findings are as follows: 1. Trading volume and return volatility increase first and then decrease, under the assumption that ‘ no significant macroeconomic changes ’, spillover effects exists.

The aim of this thesis is to verify and analyse presumed relations between selected macro-fundamentals, namely USD exchange rate, production index, interbank offered rate, inflation, money supply and two exogenous indices ( Standard & Poor's 500 and EURO STOXX 50), and CEE (Austria, Czech Republic, Poland, Hungary) or SEE (Bulgaria, Croatia, Slovenia, Romania) financial markets over the period from December 1995 to December 2015. In order to test the long-run cointegration relationships between studied markets and the set of macroeconomic variables, the Engle-Granger and Johansen tests are applied. The vector error correction model is used to confirm the long-run equilibrium interlinkages and the results show similar trend tendencies between stock indices and some of the macro-fundamentals in Croatia, Czech Republic, Hungary, Poland and Romania. To verify the short-run causal linkages, the Granger causality test is employed. Based on retrieved findings, the efficiency of studied markets with respect to Efficient Market Theory is reviewed. Our findings reveal several pairwise short-run causal impacts between studied macroeconomic indicators and stock indices. The only indicator which does not impact any stock market is the interbank offered rate. Moreover, according to our results, all CEE&SEE stock...

Este estudo tem como objetivo explorar e testar se os preços das moradias nas cidades de Rio de Janeiro e São Paulo podem ser explicados por um conjunto de indicadores econômicos selecionados, que inclui variáveis sociais e de custos de construção. Modelos de previsão de preços das residências foram construídos por meio da aplicação de análise fatorial seguida de regressão linear por mínimos quadrados ordinários. Estes modelos não cumpriram com todos os pressupostos estatísticos necessários. Alternativamente, para cada uma das cidades, foi obtido um modelo ajustado a partir da regressão das séries em estado estacionário, seguida da aplicação da técnica de omissão de variáveis a partir do modelo completo. Finalmente, por meio da cointegração de Johansen, foi elaborado um modelo que evidencia o comportamento de longo prazo dos índices de preços. Este modelo foi utilizado para analisar o risco de existência de bolhas imobiliárias nas cidades estudadas, que se mostrou menor em São Paulo que no Rio de Janeiro onde, no entanto, pode-se observar um movimento de convergência dos preços reais para a curva de preços de longo prazo, indicando redução gradual no sobrepreço dos imóveis, se mantida a tendência. / This study aimed at exploring and testing whether house prices in Rio de Janeiro and Sao Paulo could be explained by a set of selected economic indexes, which includes social variables and construction costs. Some prediction models were constructed by applying a factor analysis followed by an ordinary least-squares linear regression. However, these models have failed to comply with all the necessary statistical assumptions. Alternatively, for each of the cities, an accurate model was obtained by applying a stepwise regression technique to a set of steady state variables (first, second and third difference). Finally, it was used the Johansen cointegration to develop a model for the long-term behavior of house prices. The model was used to analyze the risk of real estate bubbles in the studied cities, which was shown to be lower in Sao Paulo than in Rio de Janeiro. However, Rio exhibits a convergence trend in real prices to the long-term price curve, indicating gradual reduction in overpricing, if the trend continues.

過去許多學術文獻針對租稅優惠吸引投資之效果進行實證分析，但實證結論並不一致。我國自1950年即開始實施一連串的租稅獎勵政策，時至今日，租稅減免仍是我國政府推動重大經濟政策慣用的誘因手段。為探討了解臺灣實施租稅優惠措施對投資變化之影響，本研究針對我國自民國50年代後期以來涉及租稅減免之相關法令進行整理，另為了充分量化這些租稅優惠措施，則參考國外相關實證文獻作法，建構了兩項租稅誘因指標作為虛擬變數，來追蹤自民國61年以來我國不同階段之減免稅狀態，並作為虛擬變數納入後續實證模型分析。 本研究利用相關變數之時間序列資料來探討租稅優惠對我國外人直接投資與國內私人投資之互動變化關係。研究步驟有三，首先，針對個別變數進行單根檢定，藉以確認變數的屬性，了解時間序列資料是否為衡定後，再利用Johansen共整合檢定法來估計和檢定多個變數，確認各變數間是否存在共整合關係後，以誤差修正模型來說明各變數間關係與整個變數脫離均衡關係後之動態調整情形。 實證結果顯示，就長期趨勢而言，我國實施之租稅優惠措施對吸引外人直接投資呈現負向且顯著之不良影響，另長期而言，租稅優惠誘因對刺激我國國內投資之變化確有顯著且正面助益，但影響效果之幅度不大。因此，本研究建議政府與其提供效果不明確之租稅誘因，不如致力於針對國家自身不完善的基礎建設或不穩定的總體經濟環境進行改善。 / Tax incentives have been in existence in Taiwan since 1950, and they are still very much on the agenda of the government. There is no agreement about the efficacy of incentives. Indeed there have been doubts about whether incentives have any effect on the economy since the 1950s. This has made some economists wonder why incentives are so popular despite the fact that their effects are either slight or unknow. This study conducts an empirical investigation of the impact of tax incentives on investment in Taiwan. We constructed two indexs of tax incentives which track the different types of incentives embarked upon by the government, and these indexes are then included in both foreign direct investment and private investment equations. Our testing procedure involves three steps. The first step involves tasting for the properties of the variables by conducting unit root teste. The second step involves testing for the long-run relationship between the variables using Johansen cointegration tests. And the third step involves estimating the long-run parameters and associated loading factors. The empirical results shows a significant negative impact of tax incentives on FDI, and a significant positive impact of tax incentives on private investment but the impact is slight. We suggest that rather than focusing on tax incentives, the country should concentrate on removing the factors that discourage investors such as poor infrastructural and institutions or macroeconomic instability.

本文之目的在於分析台灣與中國雙邊貿易之主要決定因素，並深入探討造成台灣對中國長期出現大量順差的主要原因。本文之實證模型與過去文獻主要差異在於分別就進出口供給與需求建立聯立方程式，推導成縮減式，分析進出口供需的相互影響。在台灣出口供給方面，本文考慮了國內投入、進口中間投入、台灣外人直接投資(FDI)及研發創新等因素。在台灣進口需求方面，除了考慮實質所得、雙邊匯率，本文也考慮了第三國匯率及雙向FDI之影響。 本文實證分析採用自1996年1月至2009年12月期間月資料。實證結果顯示雙邊實質所得、台灣對中國直接投資與台灣研發創新的確皆造成台灣對中國進出口之增加。然而，各國對台灣直接投資，卻造成台灣對中國進出口的減少。至於實質匯率的結果，在台灣對中國之出口方面，當新台幣相對於人民幣貶值，確實造成對中國出口增加。在中國市場，第三國價格相對中國價格上揚，造成台灣對中國出口有負向影響，此顯示台灣出口財與第三國出口財為互補關係。在台灣自中國之進口方面，當新台幣相對於人民幣貶值，的確造成自中國進口減少。在台灣市場，第三國價格相對於台灣價格上揚，造成台灣自中國進口有正向影響，表中國出口財與第三國出口財為替代關係。此外，本文發現，進口中間投入的相對價格上揚，將造成台灣自中國進口減少。 總而言之，本文研究結果顯示，除了實質所得以及雙邊匯率之外，第三國匯率、雙向FDI以及研發在兩岸進出口貿易上也扮演相當重要角色。此結果有助於瞭解台灣對中國持續順差之背後原因。 / The objective of this study is to analyze the main determinants of bilateral trade across the Taiwan Straits with a view toward exploring the causes of the Taiwan’s persistent large trade surplus with China. Our empirical model differs from most previous studies in the following aspects: we construct a system of equations to examine the demand-supply relationship ; on the supply side, the effects of inward FDI, the cost of intermediate imports on Taiwan’s production and R&D innovation are considered ; on the demand side, in additional to bilateral real exchange rates and real income, this paper also considers the indirect effects of exchange rate of third countries and bilateral FDI. The data covering January, 1996 to December, 2009 are used in our empirical analysis. The empirical evidence indicates that the bilateral real income, Taiwan’s real direct investment to China and R&D innovation have positive effects on Taiwan’s exports towards and imports from China, however, the inward FDI to Taiwan presents negative effects. As for real exchange rate, it appears that Taiwan’s export to China would increase along with the real depreciation of the NTD against the RMB. In addition, the rising relative price of the third country against the price of China would result in a negative effect of Taiwan’s export to China, representing that the goods of Taiwan and the third country are complements. On the other hand, Taiwan’s import from China would decrease along with the real depreciation of the NTD against the RMB. In addition, the rising relative price of the third country against the price of Taiwan would bring about a positive effect of Taiwan’s import from China. This reveals that the goods of China and the third country are substitutes. Moreover, a negative effect on the import of Taiwan from China appears when the cost of intermediate imports of Taiwan increases. In sum, this study illustrates that, in addition to real income and bilateral exchange rates, the exchange rates of third countries, FDI inflows and outflows and innovation have also played an important role in determining bilateral trade across the Taiwan Straits. It will help understand the driving forces behind Taiwan’s persistent trade surplus against China.