Results 11 to 20 of about 48,002 (260)

Stuck at zero: Price rigidity in a runaway inflation [PDF]

Economics Letters, 2021
We use micro level retail price data from convenience stores to study the link between 0-ending price points and price rigidity during a period of a runaway inflation, when the annual inflation rate was in the range of 60%-430%. Surprisingly, we find that 0-ending prices are less likely to adjust, and when they do adjust, the average adjustments are ...
Avichai Snir, Haipeng (Allan) Chen, Daniel Levy   +2 more
openaire   +4 more sources

Evaluation of negative binomial and zero-inflated negative binomial models for the analysis of zero-inflated count data: application to the telemedicine for children with medical complexity trial

Trials, 2023
Background Two characteristics of commonly used outcomes in medical research are zero inflation and non-negative integers; examples include the number of hospital admissions or emergency department visits, where the majority of patients will have zero ...
Kyung Hyun Lee, Claudia Pedroza, Elenir B. C. Avritscher, Ricardo A. Mosquera, Jon E. Tyson   +4 more
doaj   +1 more source

A comparison of statistical methods for modeling count data with an application to hospital length of stay

BMC Medical Research Methodology, 2022
Background Hospital length of stay (LOS) is a key indicator of hospital care management efficiency, cost of care, and hospital planning. Hospital LOS is often used as a measure of a post-medical procedure outcome, as a guide to the benefit of a treatment
Gustavo A. Fernandez, Kristina P. Vatcheva   +1 more
doaj   +1 more source

On the equivalence of one‐inflated zero‐truncated and zero‐truncated one‐inflated count data likelihoods [PDF]

Biometrical Journal, 2022
AbstractOne‐inflation in zero‐truncated count data has recently found considerable attention. There are currently two views in the literature. In the first approach, the untruncated model is considered as one‐inflated whereas in the second approach the truncated model is viewed as one‐inflated. Here, we show that both models have identical model spaces
openaire   +3 more sources

Zero-inflated models and estimation in zero-inflated Poisson distribution

Communications in Statistics - Simulation and Computation, 2017
In this paper, we briefly overview different zero-inflated probability distributions. We compare the performance of the estimates of Poisson, Generalized Poisson, ZIP, ZIGP and ZINB models through Mean square error (MSE), bias and Standard error (SE) when the samples are generated from ZIP distribution.
Yogita S. Wagh, Kirtee K. Kamalja
openaire   +1 more source

PERFORMA PROPORSI ZERO-INFLATION PADA REGRESI ZERO-INFLATED NEGATIVE BINOMIAL (STUDI KASUS: DATA TETANUS NEONATORUM DI JAWA TIMUR)

E-Jurnal Matematika, 2018
Tetanus Neonatorum (TN) is an infectious disease that could be prevented by immunization. East Java Province is the highest numbers of TN case in Indonesia. TN data in East Java contain overdispersion and big proportion of zero-inflation (71,05%).
LUTHFATUL AMALIANA, UMU SA’ADAH, NI WAYAN SURYA WARDHANI   +2 more
doaj   +1 more source

Generalized Sichel Distribution and Associated Inference [PDF]

Journal of Statistical Theory and Applications (JSTA), 2017
In this paper, we propose a generalized form of Sichel distribution which is obtained by mixing the Poisson distribution with the extended generalized inverse Gaussian distribution.
Yeh Ching Low, Seng Huat Ong, Ramesh C. Gupta   +2 more
doaj   +1 more source

Observational Status of Zero-Point Length Cosmic Inflation [PDF]

Iranian Journal of Astronomy and Astrophysics
We examine observational status of cosmological inflation with a zero-point length. By considering the zero-point length correction to the geometric part of the field equations, specially the Hubble parameter, we derive modified background equations ...
Elahe Pourmohseni, Kourosh Nozari, Amin Nassiri-Rad   +2 more
doaj   +1 more source

Deep Learning for seasonality modelling in Inflation-Indexed Swap pricing [PDF]

Risk Management Magazine, 2021
An Inflation-Indexed Swap (IIS) is a derivative in which, at every payment date, the counterparties swap an inflation rate with a fixed rate. For the calculation of the Inflation Leg cash flows it is necessary to build a mathematical model suitable for ...
Pier Giuseppe Giribone, Duccio Martelli
doaj   +1 more source

Comparing Zero-inflated Poisson, Zero-inflated Negative Binomial and Zero-inflated Geometric in Count Data with Excess Zero

Asian Journal of Probability and Statistics, 2019
Count data often violate the assumptions of a normal distribution due to the fact that they are bounded by their lowest value which is zero. The Poison distribution is sometimes suggested but when the assumption of equal mean and variance is violated due to over-dispersion and presence of zeros we tend to look in the direction of other models.
R. A. Ipinyomi, M. I. Adarabioyo
openaire   +2 more sources