October 30, 2016
Gauri Nanda, a 27 year old MIT graduate, developed Clocky the alarm clock
Designed to help people who struggled to get out of bed
Prototype became po
WHAT IS AN APPROPRIATE MODEL FOR WALMART RETURNS ?
Given that we have only the Walmart return series and that the series does not exhibit any
autocorrelations or any deterministic patterns such as trend andor seasonality our choice
is quite limited.
MODELING CORRELATED TIME SERIES
How do we model TS which do not exhibit any (deterministic) structure such as trend
andor seasonality or random walk type behavior ?
Consider the daily (deseasonalized) sales of a product (TS starts at Jan12, 1985)
SMOOTHING MODELS (METHODS)
Smoothing a TS means representing the trend at a given point in time by a weighted
average of the observed values in the vicinity of that point.
(i) In polynomial trend fitting, we estimate the trend at time point > by
What is a good model?
Classification based on binary concepts:
Medical tests are interpreted as data science
tests positive detects the presence of the
What about the null/alternate hypothesis?
=> Bad positives and good
Fi#ng a Model to Data
Segmenta1on nds the best choice of
variables in the data
Alterna1vely, we can start by specifying the
model and then nd the op1mal parameters
of the model with the data
Unspecied parameters -> mo
Client Engagement Statement
Optics Valley Hunan Nano Technology Co. Ltd., a leading producer of nanotechnology
and nanomaterials in China and is currently manufacturing many nanotechnology based products
for the healt
History & Current
Formed after WWII to
Health Products Team
May 26th, 2016
- Growing Consumption
- Growing Middle Class
- New Tax rule benefits
- Social Media Campaign
High Potential Products
Focus on the
The methanol industry: an attractive or unattractive industry?
A widely used and traded commodity
Almost 50 million tonnes of global demand in
Highly dependent on other commodities:
February 16, 2016
Samsung has experienced exponential growth over the
past decade under multiple leaders and visions. To
sustain growth into the future the following
recommendations are provided:
Strong leaders with deep
March 10, 2016
Aspirations for Dell
Dell is to segment their business units (enterprise and consumer) in order to
focus their efforts to increase global market share. The firm also needs to
refine their limited consumer-facing retail strategy, while
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The time-series of life
How do we model TS which do not exhibit any
(deterministic) structure such as trend and/or
seasonality or random walk type behavior ?
If the series is not white noise, then how do we
model it ?