Bitcoin and the South Sea Company: A comparative analysis

This paper examines historical Bitcoin price data together with the price data of a well-known and generally accepted historical asset price bubble (the 1720 South Sea Bubble) with the aim of identifying possible similarities. In order to find empirical evidence of speculative bubble tendencies, the article analyses distribution moments and autoregressive models of time series of both assets. Results show that historical daily prices of both assets—taking into account one year before and one year after the maximum price level—clearly show the two phases of bubble expansion and subsequent crash. Furthermore, various similarities between the South Sea Bubble and Bitcoin can be found in descriptive statistics, such as mean of return, standard deviation, and skewness. Statistical tests also show several explosive moments in the time series of the South Sea Company and Bitcoin returns, which implies that both assets exhibit more than one financial bubble.

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Análise de não Homogeneidades de Séries de Vazão de Captações de Nascentes na Bacia Hidrográfica do Rio Gramame, PB, Brasil

Revista Brasileira de Geografia Física ◽

10.26848/rbgf.v13.6.p2896-2907 ◽

2020 ◽

Vol 13 (6) ◽

pp. 2896

Author(s):

Adriana Moura Martins ◽

Hamilcar José Almeida Filgueira ◽

Azamor Cirne de Azevedo Filho ◽

Tarciso Cabral da Silva ◽

Marcelo Henriques Da Silva Júnior

Keyword(s):

Time Series ◽

River Basin ◽

Statistical Tests ◽

Local Communities ◽

Rainfall Data ◽

South Coast ◽

Change Points ◽

Data Series ◽

The South ◽

Perennial Springs

A bacia hidrográfica do rio Gramame, no litoral sul paraibano, apresenta diversas nascentes perenes de água com vazões significativas que atendem a comunidades locais para diversos usos. Este trabalho teve como objetivo analisar quatro séries de vazões de captações de nascentes na região sudoeste da bacia e de dados pluviométricos, quanto à sua homogeneidade, entre os anos de 2010 e 2013. A questão motivadora da análise foi a suposta diminuição das vazões de captação das nascentes por consequência da construção de estradas e desmatamentos em áreas do entorno dessas nascentes. Para a análise da homogeneidade das séries, foram empregados testes estatísticos para determinação dos possíveis pontos de ruptura e de verificação da estacionariedade. Foi constatado que houve ruptura em todas as séries de vazões analisadas. Analysis of non-homogeneities of time series of flow in sources in the Gramame River basin, Paraíba State, Brazil A B S T R A C TThe Gramame river basin on the south coast of Paraiba State, has several perennial springs with significant flows that serve local communities for various uses. However, the construction of roads, in areas around the springs, and recent deforestation indicated to have caused the decrease in flows captured from sources in the basin. This work aimed at analyzing four data series of flows captured from sources in the southwestern basin and the rainfall data series searching to verify their homogeneity, between the years 2010 and 2013. To analyze the homogeneity of the series, statistical tests were used to find significant change points and to verify the stationarity. It was found that rupture occurred in all series of flow analyzed.Keywords: flow from springs, hydrometeorological time series, groundwater.

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Germany's New Possessions in the South Sea

Scientific American ◽

10.1038/scientificamerican08261899-19782asupp ◽

1899 ◽

Vol 48 (1234supp) ◽

pp. 19782-19782

Keyword(s):

The South ◽

South Sea

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D’une hétérotopie à l’autre où le vagabondage au féminin (Jean Echenoz, Un an)

Quêtes littéraires ◽

10.31743/ql.4583 ◽

2014 ◽

pp. 156-163

Author(s):

Simona Jişa

Keyword(s):

Point Of View ◽

Standard Of Living ◽

Human Being ◽

The South ◽

Railway Stations ◽

Spatial Point ◽

Strong Feeling ◽

Continuous Decrease ◽

One Year ◽

Jean Echenoz

Jean Echenoz’s text presents Victoria’s story who runs away from Paris, believing that she has killed her lover. Her straying (that embraces the form of a relative deterritorialization in a Deleuzian sense) lasts one year and it is built up geographically upon a descent (more or less symbolical) to the South of France and, after that, she comes back to Paris and encloses the spatial and textual curl. From a spatial point of view, she turns into a heterotopia (Foucault) every place where she is located, fact that reflects her incapability of constituting a personal, intimate space. The railway stations, the trains, the hotels, the improvised houses of those with no fixed abode are turning, according to Marc Augé’s terminology, into a « non-lieux » that excludes human being. Her vagrancy is characterized through a continuous flight from police and people and through a continuous decrease of her standard of living and dignity. It’s not about a quest of oneself, but about a loss of oneself. Urged by a strong feeling of culpability, her vagrancy is a self-punishment that comes to an end when the concerns of her problems disappear and she finds out that her lover is alive.

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