{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2024,8,23]],"date-time":"2024-08-23T08:34:47Z","timestamp":1724402087880},"reference-count":22,"publisher":"World Scientific Pub Co Pte Lt","issue":"05","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Int. J. Wavelets Multiresolut Inf. Process."],"published-print":{"date-parts":[[2012,9]]},"abstract":"<jats:p> Local regularity analysis is useful in many fields, such as financial analysis, fluid mechanics, PDE theory, signal and image processing. Different quantifiers have been proposed to measure the local regularity of a function. <\/jats:p><jats:p> In this paper we present a new quantifier of local regularity of a signal: the pointwise wavelet leaders entropy. We define this new measure of regularity by combining the concept of entropy, coming from the information theory and statistical mechanics, with the wavelet leaders coefficients. Also we establish its inverse relation with one of the well-known regularity exponents, the pointwise H\u00f6lder exponent. <\/jats:p><jats:p> Finally, we apply this methodology to the financial data series of the Dow Jones Industrial Average Index, registered in the period 1928\u20132011, in order to compare the temporal evolution of the pointwise H\u00f6lder exponent and the pointwise wavelet leaders entropy. The analysis reveals that temporal variation of these quantifiers reflects the evolution of the Dow Jones Industrial Average Index and identifies historical crisis events. <\/jats:p><jats:p> We propose a new approach to analyze the local regularity variation of a signal and we apply this procedure to a financial data series, attempting to make a contribution to understand the dynamics of financial markets. <\/jats:p>","DOI":"10.1142\/s0219691312500488","type":"journal-article","created":{"date-parts":[[2012,8,7]],"date-time":"2012-08-07T01:53:21Z","timestamp":1344304401000},"page":"1250048","source":"Crossref","is-referenced-by-count":4,"title":["AN ENTROPY BASED IN WAVELET LEADERS TO QUANTIFY THE LOCAL REGULARITY OF A SIGNAL AND ITS APPLICATION TO ANALIZE THE DOW JONES INDEX"],"prefix":"10.1142","volume":"10","author":[{"given":"MARIEL","family":"ROSENBLATT","sequence":"first","affiliation":[{"name":"Instituto de Desarrollo Humano, Universidad Nacional de General Sarmiento, J. M. Guti\u00e9rrez 1150, Los Polvorines, Pcia. de Buenos Aires, Argentina"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"EDUARDO","family":"SERRANO","sequence":"additional","affiliation":[{"name":"Escuela de Ciencia y Tecnolog\u00eda, Universidad Nacional de San Mart\u00edn, Irigoyen 3100, San Mart\u00edn, Pcia. de Buenos Aires, Argentina"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"ALEJANDRA","family":"FIGLIOLA","sequence":"additional","affiliation":[{"name":"Instituto de Desarrollo Humano, Universidad Nacional de General Sarmiento, J. M. Guti\u00e9rrez 1150, Los Polvorines, Pcia. de Buenos Aires, Argentina"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"219","published-online":{"date-parts":[[2012,10,30]]},"reference":[{"key":"rf1","doi-asserted-by":"publisher","DOI":"10.1103\/PhysRevE.57.932"},{"key":"rf2","volume-title":"Elements of Information Theory","author":"Cover T. 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