Lampart M., Mierzejewski M. Analysis of Business Cycles in the Breeding of Pigs, Cattle and Poultry and their Relationship to the Causality of Wheat and Rye Cultivation in Poland
| Autor | Magdalena Lampart, Mateusz Mierzejewski |
| Tytuł | Analysis of Business Cycles in the Breeding of Pigs, Cattle and Poultry and their Relationship to the Causality of Wheat and Rye Cultivation in Poland |
| Title | Analysis of Business Cycles in the Breeding of Pigs, Cattle and Poultry and their Relationship to the Causality of Wheat and Rye Cultivation in Poland |
| Słowa kluczowe | pork cycle, hog cycle, agribusiness, breeding, cycles |
| Key words | pork cycle, hog cycle, agribusiness, breeding, cycles |
| Abstrakt | The article presents a study on the phenomenon of pig gaps in the perspective of pig, cattle, and poultry farming in Poland. The work attempts to define the phenomenon itself as well as to show the reasons for its occurrence and significance for the Polish economy. The study used a cross-spectral analysis, which indicated cyclical relationships and shifts between the studied time series. The methodology of the work was based on a simplified spectral analysis, i.e. the use of the square of coherence, spectral density and phase spectrum. In addition, the article uses a comparative method for selected production volumes. The results were analyzed in the context of occurrence of pig cycles for breeding and cultivation. The study showed the occurrence of the relationship between pig breeding and wheat and rye cultivation. |
| Abstract | The article presents a study on the phenomenon of pig gaps in the perspective of pig, cattle, and poultry farming in Poland. The work attempts to define the phenomenon itself as well as to show the reasons for its occurrence and significance for the Polish economy. The study used a cross-spectral analysis, which indicated cyclical relationships and shifts between the studied time series. The methodology of the work was based on a simplified spectral analysis, i.e. the use of the square of coherence, spectral density and phase spectrum. In addition, the article uses a comparative method for selected production volumes. The results were analyzed in the context of occurrence of pig cycles for breeding and cultivation. The study showed the occurrence of the relationship between pig breeding and wheat and rye cultivation. |
| Cytowanie | Lampart M., Mierzejewski M. (2018) Analysis of Business Cycles in the Breeding of Pigs, Cattle and Poultry and their Relationship to the Causality of Wheat and Rye Cultivation in Poland.Zeszyty Naukowe SGGW w Warszawie - Problemy Rolnictwa Światowego, t. 18(33), z. 2: 218-227 |
| HTML | wersja html |
| Pełny tekst | PRS_2018_T18(33)_n2_s218.pdf |
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Zawadzka D. Zmiany strukturalne na rynku trzody w Stanach Zjednoczonych i ich wpływ na cykl świński
| Autor | Danuta Zawadzka |
| Tytuł | Zmiany strukturalne na rynku trzody w Stanach Zjednoczonych i ich wpływ na cykl świński |
| Title | Structural Changes on the Hog Market in the USA and Their Impact on the Hog Cycle |
| Słowa kluczowe | cykl świński, koncentracja, koordynacja pionowa |
| Key words | hog cycle, concentration, vertical coordination |
| Abstrakt | W ostatnich dwudziestu latach rynek wieprzowiny w Stanach Zjednoczonych został poddany głębokim przemianom polegających na koncentracji podmiotów na wszystkich poziomach produkcji trzody i wieprzowiny oraz na postępie w koordynacji pionowej. Duża skala produkcji i zaangażowanie dużego kapitału nie pozwalają producentom na ograniczanie produkcji w okresie spadku cen trzody. W rezultacie wahania podaży, a więc najistotniejszy element w mechanizmie „cyklu świńskiego” charakteryzuje się malejącą amplitudą wahań. Oznacza to zmianę modelu pajęczyny z periodycznego na model wahań zbieżnych. Pomimo relatywnie małych wahań produkcji, ceny trzody cechuje tak samo duża amplituda wahań i częstość ich występowania jak w poprzednich dziesięcioleciach. Dzieje się tak, z dwu powodów. Z jednej strony zgodnie z teorią ekonomii usztywnionemu popytowi towarzyszy giętkość cen. Z drugiej strony na ceny trzody wpływ mają także kursy dolara do walut krajów, z którymi Stany Zjednoczone prowadzą handel zagraniczny. |
| Abstract | In the last twenty years, the pork meat market in the United States was modified in many aspects including changes in concentration of the pig and pork production as well as on progress in the vertical coordination. The large production and the involvement of large capital does not allow producers to restrict production in a period of falling prices of pigs. As a result, fluctuations in supply, being the most important element of "hog cycle" is characterized by decreasing their amplitude. It is accompanied by changing of the cobwebs model from periodic to convergent fluctuations. However, regardless of small variations in production, pig prices are characterized by the same large amplitude fluctuations and their frequency as in previous decades. This happens due to two reasons. On the one hand, according to economic theory inelastic demand is accompanied by flexibility of prices. On the other hand, the pig prices are influenced by exchange rates of currencies with respect to dollar of the countries trading with the United States. Celem badań jest przedstawienie tych zależności. |
| Cytowanie | Zawadzka D. (2017) Zmiany strukturalne na rynku trzody w Stanach Zjednoczonych i ich wpływ na cykl świński.Zeszyty Naukowe SGGW w Warszawie - Problemy Rolnictwa Światowego, t. 17(32), z. 1: 216-225 |
| HTML | wersja html |
| Pełny tekst | PRS_2017_T17(32)_n1_s216.pdf |
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