Browsing Brage IMR by Author "Subbey, Sam"

Now showing items 1-3 of 3

An improved methodology for quantifying causality in complex ecological systems

Solvang, Hiroko Kato; Subbey, Sam (Journal article; Peer reviewed, 2019)

This paper provides a statistical methodology for quantifying causality in complex dynamical systems, based on analysis of multidimensional time series data of the state variables. The methodology integrates Granger’s ...
Causal Drivers of Barents Sea Capelin(Mallotus villosus) Population Dynamics on Different Time Scales

Subbey, Sam; Solvang, Hiroko Kato; Frank, Anna-Simone Josefine (Journal article; Peer reviewed, 2017)

The dynamics of marine populations are usually forced by biotic and abiotic factors occurring at different intensity levels and time scales. Deriving the time frame within which each factor has a causal influence is important ...
INTEGRATING HAWKES PROCESS- ND BIOMASS MODELS TO CAPTURE IMPULSIVE POPULATION DYNAMICS

Subbey, Sam; Solvang, Hiroko Kato (Journal article, 2019)

This paper presents a modeling framework that captures the impulsive biomass dynamics (bust-boom) of a fish stock. The framework is based on coupling a Hawkes-process model to a discrete-time, ages-structured population ...