{"id":{"repo_id":"greece","oai_identifier":"oai:10442/1162"},"canonical_url":"https://search.dev.ndltd.org/etd/greece/oai:10442/1162","repository":{"repo_id":"greece","name":"Greek National Archive of PhD Theses","base_url":"https://phdtheses.ekt.gr/eadd_oai/request"},"display":{"title":"ΤΑΥΤΟΧΡΟΝΗ ΧΡΗΣΙΜΟΠΟΙΗΣΗ ΣΤΟΙΧΕΙΩΝ ΜΕ ΔΙΑΦΟΡΗ ΧΡΟΝΙΚΗ ΑΘΡΟΙΣΤΙΚΟΤΗΤΑ ΣΤΗΝ ΕΚΤΙΜΗΣΗ ΟΙΚΟΝΟΜΕΤΡΙΚΩΝ ΥΠΟΔΕΙΓΜΑΤΩΝ","abstract":"IN PRACTICAL MODEL-BUILDING SITUATION THE ECONOMIST FREQUENTLY ENCOUNTERS SERIES WHICH, AT LEAST FOR PART OF THE TIME PERIOD UNDER CONSIDERATION ARE ONLY AVAILABLE AT A HIGHER LEVEL OF TEMPORAL AGGREGATION THAN THE REMAINDER OF THE SERIES HE IS USING . IN THESE CIRCUMSTANCES THE ECONOMIST WILL GENERALLY CHOOSE BETWEEN ESTIMATING AN MODEL IN THE POSSIBLE AGGREGATION LEVEL OR TO INTERPOLATE THEMISSING DATA IN ORDER TO ESTIMATE THE MODEL IN THE PROPER LIVE AGGREGATION LEVEL. IN THIS DISSERTATION WE SUGGEST A METHOD TO ESTIMATE THE MODEL IN THE PROPER AGGREGATION LEVEL. WE TREAT THE MISSING OBSERVATIONS AS UNKNOWN PARAMETERS WHICH HAVE TO BE ESTIMATED SIMULTANEOUSLY WITH THE OTHER PARAMETERS OF THE MODEL,TAKING INTO ACCOUNT ALL THE AVAILABLE INFORMATION. OUR METHOD IS A FULL INFORMATION LIKELIHOOD METHOD.","abstract_html":"IN PRACTICAL MODEL-BUILDING SITUATION THE ECONOMIST FREQUENTLY ENCOUNTERS SERIES WHICH, AT LEAST FOR PART OF THE TIME PERIOD UNDER CONSIDERATION ARE ONLY AVAILABLE AT A HIGHER LEVEL OF TEMPORAL AGGREGATION THAN THE REMAINDER OF THE SERIES HE IS USING . IN THESE CIRCUMSTANCES THE ECONOMIST WILL GENERALLY CHOOSE BETWEEN ESTIMATING AN MODEL IN THE POSSIBLE AGGREGATION LEVEL OR TO INTERPOLATE THEMISSING DATA IN ORDER TO ESTIMATE THE MODEL IN THE PROPER LIVE AGGREGATION LEVEL. IN THIS DISSERTATION WE SUGGEST A METHOD TO ESTIMATE THE MODEL IN THE PROPER AGGREGATION LEVEL. WE TREAT THE MISSING OBSERVATIONS AS UNKNOWN PARAMETERS WHICH HAVE TO BE ESTIMATED SIMULTANEOUSLY WITH THE OTHER PARAMETERS OF THE MODEL,TAKING INTO ACCOUNT ALL THE AVAILABLE INFORMATION. OUR METHOD IS A FULL INFORMATION LIKELIHOOD METHOD.","abstract_has_math":false,"creators":["Τσερκέζος, Δίκαιος"],"institution":"University of Piraeus (UNIPI)","degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":null,"school":null,"contributors":[],"advisors":[],"committee_chairs":[],"committee_members":[],"year":1989,"date_issued":"1989","date_published":"1989","updated_at":"2026-07-24T02:24:46Z","subjects":["\"MISSING\" OBSERVATIONS TECHNIQUES","CORRECTION OF ELECTRICITY CONJUMPTION DATA","DYNAMIC SYSTEM OF EQUATIONS","FULL INFORMATION MAXIMUM LIKELIHOOD TECHNIQUES","SINCLE EQUATION MODELS (DYNAMIC)","TIMEAGGREGATION-ECONOMETRIC MODELLING","ΕΚΤΙΜΗΣΗ ΣΥΣΤΗΜΑΤΟΣ ΚΑΤΑΝΑΛΩΣΗΣ Η/Ε ΣΤΗΝ ΕΛΛΑΔΑ","ΕΦΑΡΜΟΓΕΣ ΕΜΠΕΙΡΙΚΕΣ ΣΤΗΝ ΔΙΟΡΘΩΣΗ ΤΗΣ Η/Ε","ΤΕΧΝΙΚΕΣ \"MISSING OBSERVATIONS\"","ΤΕΧΝΙΚΕΣ ΜΕΓΙΣΤΗΣ ΠΙΘΑΝΟΦΑΝΕΙΑΣ","ΥΠΟΔΕΙΓΜΑΤΑ ΔΥΝΑΜΙΚΑ ΑΛΛΗΣ ΕΞΙΣΩΣΗΣ","ΥΠΟΔΕΙΓΜΑΤΑ ΔΥΝΑΜΙΚΑ ΣΥΣΤΗΜΑΤΟΣ ΕΞΙΣΩΣΕΩΝ","Κοινωνικές Επιστήμες","Οικονομικά και Επιχειρήσεις","Social Sciences","Economics and Business"],"languages":["gre"],"rights":[],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["10.12681/eadd/1162"],"render_values":[{"text":"10.12681/eadd/1162","href":"https://doi.org/10.12681/eadd/1162","code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/10442/hedi/1162","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:creator","label":"Author","values":["Τσερκέζος, Δίκαιος"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["1989"]},{"key":"dc:publisher","label":"Institution","values":["University of Piraeus (UNIPI)","Πανεπιστήμιο Πειραιώς"]},{"key":"dc:type","label":"Dc Type","values":["PhD Thesis"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["\"MISSING\" OBSERVATIONS TECHNIQUES","CORRECTION OF ELECTRICITY CONJUMPTION DATA","DYNAMIC SYSTEM OF EQUATIONS","FULL INFORMATION MAXIMUM LIKELIHOOD TECHNIQUES","SINCLE EQUATION MODELS (DYNAMIC)","TIMEAGGREGATION-ECONOMETRIC MODELLING","ΕΚΤΙΜΗΣΗ ΣΥΣΤΗΜΑΤΟΣ ΚΑΤΑΝΑΛΩΣΗΣ Η/Ε ΣΤΗΝ ΕΛΛΑΔΑ","ΕΦΑΡΜΟΓΕΣ ΕΜΠΕΙΡΙΚΕΣ ΣΤΗΝ ΔΙΟΡΘΩΣΗ ΤΗΣ Η/Ε","ΤΕΧΝΙΚΕΣ \"MISSING OBSERVATIONS\"","ΤΕΧΝΙΚΕΣ ΜΕΓΙΣΤΗΣ ΠΙΘΑΝΟΦΑΝΕΙΑΣ","ΥΠΟΔΕΙΓΜΑΤΑ ΔΥΝΑΜΙΚΑ ΑΛΛΗΣ ΕΞΙΣΩΣΗΣ","ΥΠΟΔΕΙΓΜΑΤΑ ΔΥΝΑΜΙΚΑ ΣΥΣΤΗΜΑΤΟΣ ΕΞΙΣΩΣΕΩΝ","Κοινωνικές Επιστήμες","Οικονομικά και Επιχειρήσεις","Social Sciences","Economics and Business"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["gre"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["10.12681/eadd/1162","http://hdl.handle.net/10442/hedi/1162"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["IN PRACTICAL MODEL-BUILDING SITUATION THE ECONOMIST FREQUENTLY ENCOUNTERS SERIES WHICH, AT LEAST FOR PART OF THE TIME PERIOD UNDER CONSIDERATION ARE ONLY AVAILABLE AT A HIGHER LEVEL OF TEMPORAL AGGREGATION THAN THE REMAINDER OF THE SERIES HE IS USING . IN THESE CIRCUMSTANCES THE ECONOMIST WILL GENERALLY CHOOSE BETWEEN ESTIMATING AN MODEL IN THE POSSIBLE AGGREGATION LEVEL OR TO INTERPOLATE THEMISSING DATA IN ORDER TO ESTIMATE THE MODEL IN THE PROPER LIVE AGGREGATION LEVEL. IN THIS DISSERTATION WE SUGGEST A METHOD TO ESTIMATE THE MODEL IN THE PROPER AGGREGATION LEVEL. WE TREAT THE MISSING OBSERVATIONS AS UNKNOWN PARAMETERS WHICH HAVE TO BE ESTIMATED SIMULTANEOUSLY WITH THE OTHER PARAMETERS OF THE MODEL,TAKING INTO ACCOUNT ALL THE AVAILABLE INFORMATION. OUR METHOD IS A FULL INFORMATION LIKELIHOOD METHOD.","ΣΤΗΝ ΕΦΗΡΜΟΣΜΕΝΗ ΟΙΚΟΝΟΜΕΤΡΙΑ ΟΙ ΟΙΚΟΝΟΜΟΛΟΓΟΙ ΠΟΛΛΕΣ ΦΟΡΕΣ ΣΥΝΑΝΤΟΥΝ ΧΡΟΝΟΛΟΓΙΚΕΣ ΣΕΙΡΕΣ ΟΙ ΟΠΟΙΕΣ (ΓΙΑ ΜΕΡΟΣ ΤΟΥΛΑΧΙΣΤΟΝ ΤΟΥ ΔΕΙΓΜΑΤΟΣ ΕΚΤΙΜΗΣΗΣ) ΠΑΡΟΥΣΙΑΖΟΥΝ ΕΝΤΟΝΑ ΠΡΟΒΛΗΜΑΤΑ ΧΡΟΝΙΚΗΣ ΑΘΡΟΙΣΤΙΚΟΤΗΤΑΣ. ΥΠΟ ΑΥΤΕΣ ΤΙΣ ΠΡΟΣΠΑΘΕΙΕΣ Ο ΟΙΚΟΝΟΜΟΛΟΓΟΣ ΕΧΕΙ ΝΑ ΔΙΑΛΕΞΕΙ ΕΙΤΕ ΝΑ ΕΚΤΙΜΗΣΗ ΤΟ ΥΠΟΔΕΙΓΜΑ ΤΟΥ ΣΤΟ ΔΥΝΑΤΟ ΕΠΙΠΕΔΟΧΡΟΝΙΚΗΣ ΑΘΡΟΙΣΤΙΚΟΤΗΤΑΣ, ΕΙΤΕ ΝΑ ΕΚΤΙΜΗΣΕΙ ΤΙΣ ΕΛΛΙΠΕΙΣ ΠΑΡΑΤΗΡΗΣΕΙΣ ΜΕ ΚΑΠΟΙΑ ΤΕΧΝΙΚΗ INTERPOLATION. ΣΤΗ ΔΙΑΤΡΙΒΗ ΑΥΤΗ ΠΡΟΤΕΙΝΟΥΜΕ ΚΑΙ ΑΝΑΠΤΥΣΣΟΥΜΕ ΜΙΑ ΤΕΧΝΙΚΗ ΕΛΛΙΠΩΝ ΠΑΡΑΤΗΡΗΣΕΩΝ. ΟΙ ΕΛΛΙΠΕΙΣ ΠΑΡΑΤΗΡΗΣΕΙΣ ΕΚΤΙΜΩΝΤΑΙ ΤΑΥΤΟΧΡΟΝΑ ΜΕ ΤΙΣ ΠΑΡΑΜΕΤΡΟΥΣ ΤΟΥ ΥΠΟ ΕΚΤΙΜΗΣΗ ΥΠΟΔΕΙΓΜΑΤΟΣ ΣΤΟ ΕΠΙΘΥΜΗΤΟ ΕΠΙΠΕΔΟ ΧΡΟΝΙΚΗΣ ΑΘΡΟΙΣΤΙΚΟΤΗΤΑΣ ΛΑΜΒΑΝΟΝΤΑΣ ΥΠ'ΟΨΗ ΟΛΕΣ ΤΙΣ ΔΙΑΘΕΣΙΜΕΣ ΠΛΗΡΟΦΟΡΙΕΣ. Η ΠΡΟΤΕΙΝΟΜΕΝΗ ΤΕΧΝΙΚΗ ΕΙΝΑΙ ΜΙΑ ΤΕΧΝΙΚΗ FULL INFORMATION MAXIMUM LIKELIHOOD."]},{"key":"dc:title","label":"Title","values":["ΤΑΥΤΟΧΡΟΝΗ ΧΡΗΣΙΜΟΠΟΙΗΣΗ ΣΤΟΙΧΕΙΩΝ ΜΕ ΔΙΑΦΟΡΗ ΧΡΟΝΙΚΗ ΑΘΡΟΙΣΤΙΚΟΤΗΤΑ ΣΤΗΝ ΕΚΤΙΜΗΣΗ ΟΙΚΟΝΟΜΕΤΡΙΚΩΝ ΥΠΟΔΕΙΓΜΑΤΩΝ","SIMULTANEOUS USE OF DATA WITH DIFFERENT TIME AGGREGATION IN THE ESTIMATION OF ECONOMETRIC MODELS"]}]}],"canonical_facts":{"dc:creator":["Τσερκέζος, Δίκαιος"],"dc:date":["1989"],"dc:description":["IN PRACTICAL MODEL-BUILDING SITUATION THE ECONOMIST FREQUENTLY ENCOUNTERS SERIES WHICH, AT LEAST FOR PART OF THE TIME PERIOD UNDER CONSIDERATION ARE ONLY AVAILABLE AT A HIGHER LEVEL OF TEMPORAL AGGREGATION THAN THE REMAINDER OF THE SERIES HE IS USING . IN THESE CIRCUMSTANCES THE ECONOMIST WILL GENERALLY CHOOSE BETWEEN ESTIMATING AN MODEL IN THE POSSIBLE AGGREGATION LEVEL OR TO INTERPOLATE THEMISSING DATA IN ORDER TO ESTIMATE THE MODEL IN THE PROPER LIVE AGGREGATION LEVEL. IN THIS DISSERTATION WE SUGGEST A METHOD TO ESTIMATE THE MODEL IN THE PROPER AGGREGATION LEVEL. WE TREAT THE MISSING OBSERVATIONS AS UNKNOWN PARAMETERS WHICH HAVE TO BE ESTIMATED SIMULTANEOUSLY WITH THE OTHER PARAMETERS OF THE MODEL,TAKING INTO ACCOUNT ALL THE AVAILABLE INFORMATION. OUR METHOD IS A FULL INFORMATION LIKELIHOOD METHOD.","ΣΤΗΝ ΕΦΗΡΜΟΣΜΕΝΗ ΟΙΚΟΝΟΜΕΤΡΙΑ ΟΙ ΟΙΚΟΝΟΜΟΛΟΓΟΙ ΠΟΛΛΕΣ ΦΟΡΕΣ ΣΥΝΑΝΤΟΥΝ ΧΡΟΝΟΛΟΓΙΚΕΣ ΣΕΙΡΕΣ ΟΙ ΟΠΟΙΕΣ (ΓΙΑ ΜΕΡΟΣ ΤΟΥΛΑΧΙΣΤΟΝ ΤΟΥ ΔΕΙΓΜΑΤΟΣ ΕΚΤΙΜΗΣΗΣ) ΠΑΡΟΥΣΙΑΖΟΥΝ ΕΝΤΟΝΑ ΠΡΟΒΛΗΜΑΤΑ ΧΡΟΝΙΚΗΣ ΑΘΡΟΙΣΤΙΚΟΤΗΤΑΣ. ΥΠΟ ΑΥΤΕΣ ΤΙΣ ΠΡΟΣΠΑΘΕΙΕΣ Ο ΟΙΚΟΝΟΜΟΛΟΓΟΣ ΕΧΕΙ ΝΑ ΔΙΑΛΕΞΕΙ ΕΙΤΕ ΝΑ ΕΚΤΙΜΗΣΗ ΤΟ ΥΠΟΔΕΙΓΜΑ ΤΟΥ ΣΤΟ ΔΥΝΑΤΟ ΕΠΙΠΕΔΟΧΡΟΝΙΚΗΣ ΑΘΡΟΙΣΤΙΚΟΤΗΤΑΣ, ΕΙΤΕ ΝΑ ΕΚΤΙΜΗΣΕΙ ΤΙΣ ΕΛΛΙΠΕΙΣ ΠΑΡΑΤΗΡΗΣΕΙΣ ΜΕ ΚΑΠΟΙΑ ΤΕΧΝΙΚΗ INTERPOLATION. ΣΤΗ ΔΙΑΤΡΙΒΗ ΑΥΤΗ ΠΡΟΤΕΙΝΟΥΜΕ ΚΑΙ ΑΝΑΠΤΥΣΣΟΥΜΕ ΜΙΑ ΤΕΧΝΙΚΗ ΕΛΛΙΠΩΝ ΠΑΡΑΤΗΡΗΣΕΩΝ. ΟΙ ΕΛΛΙΠΕΙΣ ΠΑΡΑΤΗΡΗΣΕΙΣ ΕΚΤΙΜΩΝΤΑΙ ΤΑΥΤΟΧΡΟΝΑ ΜΕ ΤΙΣ ΠΑΡΑΜΕΤΡΟΥΣ ΤΟΥ ΥΠΟ ΕΚΤΙΜΗΣΗ ΥΠΟΔΕΙΓΜΑΤΟΣ ΣΤΟ ΕΠΙΘΥΜΗΤΟ ΕΠΙΠΕΔΟ ΧΡΟΝΙΚΗΣ ΑΘΡΟΙΣΤΙΚΟΤΗΤΑΣ ΛΑΜΒΑΝΟΝΤΑΣ ΥΠ'ΟΨΗ ΟΛΕΣ ΤΙΣ ΔΙΑΘΕΣΙΜΕΣ ΠΛΗΡΟΦΟΡΙΕΣ. Η ΠΡΟΤΕΙΝΟΜΕΝΗ ΤΕΧΝΙΚΗ ΕΙΝΑΙ ΜΙΑ ΤΕΧΝΙΚΗ FULL INFORMATION MAXIMUM LIKELIHOOD."],"dc:identifier":["10.12681/eadd/1162","http://hdl.handle.net/10442/hedi/1162"],"dc:language":["gre"],"dc:publisher":["University of Piraeus (UNIPI)","Πανεπιστήμιο Πειραιώς"],"dc:subject":["\"MISSING\" OBSERVATIONS TECHNIQUES","CORRECTION OF ELECTRICITY CONJUMPTION DATA","DYNAMIC SYSTEM OF EQUATIONS","FULL INFORMATION MAXIMUM LIKELIHOOD TECHNIQUES","SINCLE EQUATION MODELS (DYNAMIC)","TIMEAGGREGATION-ECONOMETRIC MODELLING","ΕΚΤΙΜΗΣΗ ΣΥΣΤΗΜΑΤΟΣ ΚΑΤΑΝΑΛΩΣΗΣ Η/Ε ΣΤΗΝ ΕΛΛΑΔΑ","ΕΦΑΡΜΟΓΕΣ ΕΜΠΕΙΡΙΚΕΣ ΣΤΗΝ ΔΙΟΡΘΩΣΗ ΤΗΣ Η/Ε","ΤΕΧΝΙΚΕΣ \"MISSING OBSERVATIONS\"","ΤΕΧΝΙΚΕΣ ΜΕΓΙΣΤΗΣ ΠΙΘΑΝΟΦΑΝΕΙΑΣ","ΥΠΟΔΕΙΓΜΑΤΑ ΔΥΝΑΜΙΚΑ ΑΛΛΗΣ ΕΞΙΣΩΣΗΣ","ΥΠΟΔΕΙΓΜΑΤΑ ΔΥΝΑΜΙΚΑ ΣΥΣΤΗΜΑΤΟΣ ΕΞΙΣΩΣΕΩΝ","Κοινωνικές Επιστήμες","Οικονομικά και Επιχειρήσεις","Social Sciences","Economics and Business"],"dc:title":["ΤΑΥΤΟΧΡΟΝΗ ΧΡΗΣΙΜΟΠΟΙΗΣΗ ΣΤΟΙΧΕΙΩΝ ΜΕ ΔΙΑΦΟΡΗ ΧΡΟΝΙΚΗ ΑΘΡΟΙΣΤΙΚΟΤΗΤΑ ΣΤΗΝ ΕΚΤΙΜΗΣΗ ΟΙΚΟΝΟΜΕΤΡΙΚΩΝ ΥΠΟΔΕΙΓΜΑΤΩΝ","SIMULTANEOUS USE OF DATA WITH DIFFERENT TIME AGGREGATION IN THE ESTIMATION OF ECONOMETRIC MODELS"],"dc:type":["PhD Thesis"]},"updated_at":"2026-07-24T02:24:46Z"}