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Thus, there has been substantial development in marketing research related clustering models and methodology in the past 60 years. During the initial stages of market segmentation research in 1950s, the statistical models proposed depended heavily on existing Operations Research and Management Science methods. These models were either too complicated to be implemented practically or too unrealistic to accurately represent real-world situations. As researchers gained more computing power, models became more realistic and implementable [link] . However, current methods also have some shortcomings. For example, many segmentation models have difficulties capturing the relationship between the exogenous (consumer traits) and the response variables (ex. purchase frequencies and profits) in a segment [link] . Also, even if the model successfully relates segment traits with response, the time-dependent nature of consumer behavior is often ignored. Finally, many of the models involve only one dependent variable. Consider the purchase of printers among different groups of consumers. Such narrowly defined analysis maybe sufficient for, say a printer manufacturer, however, for an electronic store manager deciding how to stock, shelf and promote printers, it is helpful to be able to generalize the analysis to cover electronic products closely related to printers—printing paper, scanners, toners, etc.—since consumers who buy printers are likely to be interested in these products and vice versa. Thus, a multivariate segmentation approach can be more informative and useful.

Model-based clustering

A novel model-based method of clustering TSC was proposed by Thomas, Ray and Ensor [link] , who applied the method to Houston air pollution monitoring data. In the study, air quality monitor stations, represented by time series of pollution readings were clustered to identify regions of the city with similar patterns of pollution. The results from the pollution study were promising and motivate the used of model-based clustering (MBC) in other applications. In this study, our goal is to address the shortcomings of current market segmentation methods by applying MBC to consumer purchase data.

Outline for remainder of the discussion

We will explain MBC in more detail in Section 2. The description of the data is given in Section 3. Ongoing work and project implications are presented in Sections 4 and 5 respectively. Finally directions for future research are laid out in Section 6.


The name “model-based clustering” implies two components to the method: the modeling component and the clustering component. An appropriate model is fit to each time series and then a dissimilarity metric based on the likelihood of those models is used to cluster the TCS.

Modeling tsc

A classical model for count data is Poisson regression. Recently, Fokianos and Kedem [link] proposed a model for TSC in the general linear model (GLM) framework which can be called “observation-driven” Poisson regression. In GLM, we model the response { Y t , t = 1 , , N } as a linear function of the covariates { X t , t = 1 , , N } . There are two components to a time series following a GLM:

Questions & Answers

anyone know any internet site where one can find nanotechnology papers?
Damian Reply
Introduction about quantum dots in nanotechnology
Praveena Reply
what does nano mean?
Anassong Reply
nano basically means 10^(-9). nanometer is a unit to measure length.
do you think it's worthwhile in the long term to study the effects and possibilities of nanotechnology on viral treatment?
Damian Reply
absolutely yes
how to know photocatalytic properties of tio2 nanoparticles...what to do now
Akash Reply
it is a goid question and i want to know the answer as well
characteristics of micro business
for teaching engĺish at school how nano technology help us
Do somebody tell me a best nano engineering book for beginners?
s. Reply
there is no specific books for beginners but there is book called principle of nanotechnology
what is fullerene does it is used to make bukky balls
Devang Reply
are you nano engineer ?
fullerene is a bucky ball aka Carbon 60 molecule. It was name by the architect Fuller. He design the geodesic dome. it resembles a soccer ball.
what is the actual application of fullerenes nowadays?
That is a great question Damian. best way to answer that question is to Google it. there are hundreds of applications for buck minister fullerenes, from medical to aerospace. you can also find plenty of research papers that will give you great detail on the potential applications of fullerenes.
what is the Synthesis, properties,and applications of carbon nano chemistry
Abhijith Reply
Mostly, they use nano carbon for electronics and for materials to be strengthened.
is Bucky paper clear?
carbon nanotubes has various application in fuel cells membrane, current research on cancer drug,and in electronics MEMS and NEMS etc
so some one know about replacing silicon atom with phosphorous in semiconductors device?
s. Reply
Yeah, it is a pain to say the least. You basically have to heat the substarte up to around 1000 degrees celcius then pass phosphene gas over top of it, which is explosive and toxic by the way, under very low pressure.
Do you know which machine is used to that process?
how to fabricate graphene ink ?
for screen printed electrodes ?
What is lattice structure?
s. Reply
of graphene you mean?
or in general
in general
Graphene has a hexagonal structure
On having this app for quite a bit time, Haven't realised there's a chat room in it.
what is biological synthesis of nanoparticles
Sanket Reply
what's the easiest and fastest way to the synthesize AgNP?
Damian Reply
types of nano material
abeetha Reply
I start with an easy one. carbon nanotubes woven into a long filament like a string
many many of nanotubes
what is the k.e before it land
what is the function of carbon nanotubes?
I'm interested in nanotube
what is nanomaterials​ and their applications of sensors.
Ramkumar Reply
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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Source:  OpenStax, The art of the pfug. OpenStax CNX. Jun 05, 2013 Download for free at http://cnx.org/content/col10523/1.34
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